James Holmes, 24, was identified by two federal law enforcement officers as the man who opened fire during a screening of "The Dark Knight Rises" at an Aurora, Colorado, theater early Friday. At least 12 people were killed, Police Chief Dan Oates said. 
Police break the apartment window of James Holmes, the suspect of a movie theater shooting Friday in Aurora, Colorado. 
An ambulance is parked outside. Of the wounded, at least 20 were being treated at the University of Colorado Hospital, said spokeswoman Jacque Montgomery. "They're arriving by police, by ambulance. Some are walking in," she said. 
Agents search the suspect's car outside the theater. 
People grieve during a vigil for victims behind the theater where a gunman opened fire on moviegoers in Aurora on Friday. 
A woman grieves during a vigil for victims behind the theater. 
A distraught woman is counseled by Pastor Quincy Shannon, left, of the New Hope Fellowship and an unidentified advocate in front of Gateway High School in Aurora, Colorado, where the families of the missing are meeting following the shooting at the Century 16 movie theater. 
Lin Gan wipes away her tears as her mother, Juan Gan, guides her to their car after meeting with counselors at the Gateway High School in Aurora on Friday. 
Lin Gan, of Aurora, Colorado, holds back tears as she speaks to reporters about her experience in the Century 16 theater on Friday. 
People embrace before a vigil for victims behind the theater where a gunman opened fire on moviegoers in Aurora on Firday. 
The car belonging to the suspect is removed from behind the theater where the shooting took place on Friday. 
Investigators work on evidence near the apartment of of James Holmes on Friday. 
Memebers of the Aurora Police Department. SWAT walk near the apartment of James Holmes. Police have Holmes,24, of North Aurora in custody. 
Television news crews gather in front of the home of Robert and Arlene Holmes, parents of 24-year-old mass shooting suspect James Holmes, in San Diego, California. on Friday. 
A popcorn box lies on the ground outside the Century 16 movie theatre. 
An NYPD officer keeps watch inside an AMC move theater where the film "The Dark Knight Rises" is playing in Times Square on Friday. NYPD is maintaining security around city movie theaters following the deadly rampage in Aurora, Colorado. 
Adariah Legarreta, 4, is comforted by her grandmother Rita Abeyta near the Century 16 Theater in Aurora. 
A cyclist and pedestrians pass a theater showing the latest Batman movie in Hollywood, California, on Friday. Warner Brothers said it was "deeply saddened" by Friday's massacre at a Colorado screening of "The Dark Knight Rises." 
Obama supporters observe a moment of silence for the victims at a campaign event at Harborside Event Center in Fort Myers, Florida, on Friday. 
Jessica Ghawi, an aspiring sportscaster, was one of the victims. 
A woman waits for news outside Gateway High School, a few blocks from the scene of the shooting at the Century Aurora 16. 
Aurora police chief Daniel J. Oates speaks at a press conference near the Century 16 Theater on Friday. 
Agents search the trash container outside the suspect's apartment in Aurora. 
A Federal ATF officer carries protective gear onsite at the home of alleged shooting suspect James Holmes. 
Obama speaks on the shootings at the event in Fort Myers. 
Moviegoers are interviewed at the Century Aurora 16. 
Officers gathered at the theater Friday. 
Investigators were a common sight at the theater Friday. 
Authorities gather at the shooting suspect's apartment building in Aurora. Police broke a second-floor window to look for explosives that the suspect claimed were in the apartment. 
Screaming, panicked moviegoers scrambled to escape from the black-clad gunman, who wore a gas mask and randomly shot as he walked up the theater's steps, witnesses said. 
University of Colorado Hospital spokeswoman Jacque Montgomery said that all of the wounded had injuries from gunshot wounds, ranging from minor to critical. 
A woman sits on top of her car near the crime scene. 
Police block access to the Town Center mall after the shooting. 
Witnesses told KUSA that the gunman kicked in an emergency exit door and threw a smoke bomb into the darkened theater before opening fire. 
What is believed to be the suspect's car is examined after the shooting. 
Repubican presidential candidate and former Massachusetts Gov. Mitt Romney delivers remarks regarding the shooting in an Aurora, Colorado, movie theater on Friday at a campaign event in Bow, New Hampshire. 
- The audience at first thought the gunman was part of the show
- Some dove to the floor or tried to flee after he began shooting
- They say he walked slowly up the aisle, randomly shooting at people
- Police received dozens, perhaps hundreds of 911 calls
(CNN) -- Jennifer Seeger stared at the gun pointed at her face in a darkened movie theater.
The 22-year-old had two choices: Stand there and die, or make a run for it.
She made a split-second decision and dove into a row at the Century Aurora 16 multiplex, tucking herself under the seats.
The gunman shot into the row, and then into the row behind Seeger. Bullet casings, burning hot, dropped around her.
Play dead, she told people as the shooting continued. He won't shoot people he thinks are already dead.
The Movies
In the movies, violence is coordinated. Explosions are perfectly timed. Gunshots ring out clearly. Bodies fall slowly.
But when violence strikes in real life, it is chaotic and often muffled.
That's the scene that unfolded early Friday morning, shortly after midnight, when a gunman opened fire at a movie theater in Aurora, Colorado, during a screening of the new Batman sequel.
Colorado movie theater massacre 
Shooting witness thought attack was joke 
Victim shot in the neck, describes scene 
Movie victim: 'He shot me a second time' In the few of minutes it took the gunman to unload hundreds of rounds, according to police estimates, nearly everyone inside Theater No. 9 would make a life or death decision -- sometimes with terrifying results.
The theaters of the Century 16 multiplex were filled with hard-core fans, many of whom bought tickets weeks earlier for the 12:05 a.m. premiere of "The Dark Knight Rises." Many wore costumes that emulated their favorite characters in the DC Comics franchise.
In the front of the theater, Seeger and a friend took seats in the second row, close to the screen. Emma Goose, 19, and her friends arrived late and were forced to take separate sets close to the front, also near the screen.
The gunman was there, too. He bought a ticket at the door and took a seat near the emergency exit door, according to police.
'Oh my God'
The movie was in its first minutes and most of the movie-goers didn't appear to notice the exit door open and then only partially close.
Authorities believe it was then that the gunman snuck out to his car parked in the rear of the theater to pick up weapons and don a gas mask and tactical gear, including a ballistic helmet and protective gear for his legs, throat and groin.
It was shortly after 12:35 a.m. when Seeger first saw the man wearing a gas mask and toting weapons enter the theater through the emergency exit door.
He looked like "a SWAT man," decked out head-to-toe in black, Seeger thought.
It must be part of the show, she reasoned, an added attraction on the opening night of one of the most highly anticipated movies of the year.
Goose thought the same thing.
In one hand, the man held a hissing canister, they said. In the other, a rifle.
Friend: Ghawi was 'spunky and vivacious' 
Remembering Jessica Ghawi 
Inside the theater 
'I didn't think we would get out alive' Seeger watched him as he lobbed the canister into the audience. It made a loud popping sound, witnesses say.
He then pointed the rifle toward the ceiling, firing several rounds.
In that moment, Seeger knew it was not an act. So, too, did Goose.
"Oh my God, this is really happening," Goose thought, as she dove for the floor.
Then the man lowered what is now believed to be a semi-automatic rifle, pointing it at Seeger as she stood up.
'Crawling over each other'
Panic was setting in as a realization swept through the theater that the gunman was real -- and he was planning on killing people.
Whatever was in the canister that landed in the middle of the theater was beginning to burn the eyes of movie-goers.
Some in the theater thought it was a smoke-bomb, while others believed it was tear gas.
At first, Seeger didn't know what to do. The gunman was three feet away pointing a gun at her face.
There wasn't time to make a reasoned decision. You either live or die, she told herself.
Seeger dove into the row, pushing her body underneath the seats next to her friend as she heard gunshots around her.
She quietly tried to calm her friend and those around her as hot shell casings bounced on the floor and hit her in the face, burning her forehead.
In a nearby row, Goose was on the ground, using the seats for cover, when she realized she had to move if she was going to survive.
"We started pushing each other and crawling over each other," she said.
The first 911 calls came into the Aurora Police Department at about 12:39 a.m. They were followed by dozens, perhaps hundreds more.
The voice of a dispatcher crackled over the radio to police units: "They're saying someone is shooting in the auditorium." Moments later, she added: "There is at least one person shot, but they're saying there's hundreds of people just running around."
'Shot in the face'
People were pushing and shoving one another to try to get out of the tight rows of seats and down the aisles to safety.
Goose peered over the row of seats toward the gunman, who was now making his way toward the steps of the stadium-like seating.
The gunman, witnesses would say later, walked slowly as he randomly fired at people. He shot at those who stood up and tried to flee, some said. He shot at people as they sat in their seat, said others.
She pulled out her phone to call 911 but then hid it after it lit up, fearing the gunman might see it and open fire in her direction.
Goose saw people, including a friend, run toward the hallway that served as one of the main entrances and exits for the theater. Some were wounded.
It was 12:40 a.m. when police first arrived at the theater, with one officer radioing: "I've got people running out of the theater who were shot."
Another said: "Got a victim who was shot in the face."
Then the dispatcher orders "all available units to respond to the theater."
'Play dead'
Seeger pulled herself out from under the seats and peered over the seats to see the gunman walking up the steps toward the back of theater.
For a moment, the shooting stops. Seeger said it appeared he ran out of ammunition and was either reloading or getting another gun.
It was then she told people around her "to make a run for it."
But as movie-goers began crawling and, in some cases, running toward the exit, the gunman turned and began firing on them.
"Lay down, be very still. Play dead," she told people as the crawled back toward her. "He won't shoot people he already thinks are dead."
Outside, by 12:42 a.m., police officers were surrounding the multiplex and other officers were making their way toward the theater where one smelled what he described over the radio as pepper spray.
"Get us some damn gas masks for Theater 9, we can't get in," one of the officers said.
Inside the theater, Seeger lay on the floor and played dead.
In a nearby row, Goose was trying to figure out how to get out. People were still trying to flee, and the gunman was still shooting.
In the dark, with the gunman moving toward the back of the theater, Goose crawled across the aisle -- to another row of seats near the exit. It was the same place a friend of hers was forced to sit when they couldn't find seats together.
But as soon as she cleared the aisle, she stumbled onto a man in the row who had been shot in the head. "He was grazed but bleeding a lot," she said.
Bodies in aisles
As suddenly as the shooting started, it stopped. The gunman was gone.
People, some soaked in blood, began running for the main exit.
Goose helped the wounded man out of the theater, while Seeger picked herself up off the floor and surveyed the carnage. There were bodies in the aisle, and people slumped over in seats who at first glance appeared to be dead.
Nearby, she thought heard a man "mumbling, still alive." She checked his pulse, her training as an emergency medical technician kicking in.
He was alive, but barely.
Her friend begged her, even screamed at her to leave the theater. But Seeger could not do it. Not yet.
Seeger grabbed the man under his arms and started to try to drag him out of the row of seats, toward the exit.
Suddenly, there was screaming. The gunman, moviegoers said, had returned.
Seeger was forced to flee, forced to leave the man behind.
'The Joker'
The gunman, though, was gone.
Goose, Seeger and others aren't sure how the gunman got out of the theater, whether he went through the emergency exit or some other door.
Outside, in the rear parking lot of the theater, officers radio at 12:46 a.m. that they have spotted a man who matches the description they got from those who fled the theater.
"We've got rifles, gas mask. He is detained," one officer radioed. "I've got an open door going into the theater."
The gunman identified himself to arresting officers as "the Joker," a law enforcement official later said.
From inside the theater, at about the same time, another radio dispatch: "I need someone to shut this movie off. Have them shut the movie off in 9."
CNN's Tom Foreman, Phil Gast, Don Lemon, Ed Lavandera, Susan Candiotti and Mariano Castillo contributed to this report.
