NEW HAVEN, Conn. - Connecticut police released thousands of pages Friday from their investigation into the Newtown massacre, providing the most detailed and disturbing picture yet of the rampage and Adam Lanza's fascination with murder, while also depicting school employees' brave and clear-headed attempts to protect the children.

Among the details: More than a dozen bodies, mostly children, were seen packed "like sardines" in a bathroom. And the horrors inside school were so terrible that when police sent in paramedics, they tried to select ones capable of handling what they were about to witness.

"This will be the worst day of your life," Police Sgt. William Cario warned one.

The documents' release marks the end of the investigation into the Dec. 14, 2012, shooting at Sandy Hook Elementary School that left 20 first graders and six educators dead. Lanza, 20, went to the school after killing his mother, Nancy, inside their home. He committed suicide with a handgun as police arrived at the school.

The paperwork, photos, and videos were heavily blacked out to protect the names of children and to withhold some of the more grisly details. But the horror comes through.

Included in the file were photographs of the home Lanza shared with his mother. They show numerous rounds of ammunition, gun magazines, shot-up paper targets, gun cases, shooting earplugs, and a gun safe with a rifle in it.

A former teacher of Lanza's was quoted as telling investigators that Lanza exhibited antisocial behavior, rarely interacted with other students, and obsessed in writings about "destruction and war."

The teacher added: "Adam's creative writing was so graphic that it could not be shared."

The documents also fill in more details about how the shooting unfolded and how staff members looked out for the youngsters.

Teachers heard janitor Rick Thorne try to get Lanza to leave the school. One teacher, who was hiding in a closet in the math lab, heard Thorne yell, "Put the gun down!" An aide said she heard gunfire and Thorne told her to close her door. Thorne survived.

Teacher Kaitlin Roig told police she heard "rapid-fire shooting" outside of the school, near her classroom. She rushed her students into the classroom's bathroom, pulled a rolling storage unit in front of the bathroom door as a barricade and then closed and locked the door.

She heard a voice say, "Oh, please, no. Please, no." Eventually, police officers slid their badges under the bathroom door. Roig refused to come out and told them that if they were truly police, they should be able to get the key to the door - which they did.

Others weren't so lucky.

Police Lt. Christopher Vanghele said he and another officer found what appeared to be about 15 bodies, mostly children, packed in another bathroom. So many people had tried to cram inside the bathroom that the door couldn't be closed, and the shooter gunned them all down, Vanghele surmised.

In a letter accompanying the files, Reuben F. Bradford, commissioner of the state Department of Emergency Services and Public Protection, wrote that much of the report was disturbing but that it also showed teachers trying to protect their children, law enforcement officials putting themselves in harm's way, and dispatchers working calmly and efficiently.

"In the midst of the darkness of that day, we also saw remarkable heroism and glimpses of grace," he wrote.

REPORT HIGHLIGHTS

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