Stone says entries in a diary detail a year of planning for the Columbine school shooting RELATED AUDIO A teacher in the library talks with 911 as shots are fired in the background. AIFF or WAV (349 K/30 sec. audio) RELATED VIDEO Windows Media 28K 80K CNN's Aram Roston looks at liability of parents when their children commit crimes Real 28K 80K Windows Media 28K 80K Colorado school shooting investigation update (April 24) Real 28K 80K Windows Media 28K 80K Police dispatcher talks to officers rushing to scene Real 28K 80K Windows Media 28K 80K Teacher tells students to stay down as gunshots ring out in the background Real 28K 80K Windows Media 28K 80K To view the latest video streams on the Littleton school shooting, use the arrow buttons below to scroll through the video gallery.        Windows Media Real        28 K 80 K INTERACTIVE See more scenes from the shooting Audio and Images Interactive Map: Recent school shootings in the U.S.  ALSO Fatalities at Columbine High  MESSAGE BOARD Colorado school shooting  SPECIAL SECTION Are schools safe?  Address for letters, cards for Columbine High School Messages for Columbine Communications Services Jefferson County Public Schools P.O. Box 4001 Golden, CO 80401-0001 Weapons found during the investigation: One 9 mm semi-automatic pistol One 9 mm semi-automatic rifle Two sawed-off 12-gauge shotguns More than 30 homemade explosives, some with shrapnel

April 24, 1999
Web posted at: 7:01 p.m. EDT (2301 GMT)

In this story: E-mail came after suspects died Rachel Scott remembered 2,000 pieces of evidence RELATED STORIES, SITES

LITTLETON, Colorado (CNN) -- The diary of a Columbine High School student discloses that he and another student gunman planned their bloody massacre at the school for more than a year, police said Saturday.

They were "going for the big kill" in a suicide attack to coincide with Adolf Hitler's birthday on April 20, said Jefferson County Sheriff John Stone.

Stone said the diary characterized the thinking of the assailants as: "We want to be different. We want to be strange and we don't want jocks or other people putting (us) down. ... We're going to punish you."

The diary author included maps of the school, notes on when to find large concentrations of people, and observations on good hiding places.

"They were monitoring the lunchroom," the sheriff said. "It was very intentional, the timing of this."

Stone, who declined to say which of the gunmen kept the diary, placed some of the blame for the massacre on the parents of the shooters, Dylan Klebold, 17, and Eric Harris, 18.

He noted that along with the diary, police found a shotgun barrel on a dresser of one of the boy's homes, as well as bomb-making materials.

"A lot of this stuff was clearly visible and the parents should have known," Stone said. "I think parents should be accountable for their kids' actions."

Fifteen people died in Tuesday's attack on the school, including Klebold and Harris, who turned their guns on themselves as a finale to their frenzy of violence.

E-mail came after suspects died

Meanwhile, police said they believe that neither assailant authored a note purporting to be from one of them and warning of more violence next week.

Earlier, police had expressed fears about the threat and said they didn't think the note, which originated as an e-mail message, was a hoax.

Stone said authorities now think the note was authored and sent after Harris and Klebold died. But police have not ruled out that the note may have been written by an associate of the assailants.

The note read: "I may have taken their lives and my own -- but it was your doing. Teachers, parents, let this massacre be on your shoulders until the day you die."

The note also warns of further violence to come.

"You may think the horror ends with the bullet in my head, but you wouldn't be so lucky," it read. "All that I can leave you with to decipher what more extensive death is to come is '12Skizto.' You have until April 26. Good-bye."

'12Skizto' refers to a song from the band the Insane Clown Posse, said Jefferson County Sheriff's spokesman Steve Davis.

Rachel Scott remembered

The sheriff's department statements came as a weekend of funerals began for some of those killed in the rampage.

Mourners filed into the Trinity Christian Center, a mile south of Columbine High, to write comments in black felt pen on the white casket of Rachel Scott, a 17-year-old actress in school plays who aspired to be a missionary. Friends said she was killed outside the school, one of the first to be shot.

Heidi Johnson, a friend of Scott's since fourth grade, wiped tears as she kneeled and wrote on the casket, "Rachel, I'm so proud of you! I will miss you dearly. You were truly one of my true best friends and I love you from the bottom of my heart."

Other messages said, "See you in Heaven," "You are my hero," and "You always brought a smile to my face."

Her father wrote simply: "I love you. Dad. Forever."

Scott's funeral is the first of several weekend services expected to draw students, teachers and politicians, including Vice President Al Gore.

Funerals for three more slain students will take place April 26, Davis said.

2,000 pieces of evidence

Police have interviewed hundreds of witnesses and collected 2,000 pieces of evidence, down to the smallest scraps of metal at the school. They are searching not only for a motive but for clues as to whether Harris and Klebold had accomplices, before or during the shootings. Thirty bombs were found at the school following the carnage.

Scott's friends wrote messages on her coffin

Students and police had described one gunman wearing a white T-shirt, while witnesses also spoke of two gunmen in dark trench coats. But the body of one of the gunmen was found without a trench coat.

"It's very possible, we're thinking now, that maybe the trench coat was shed at some point," Davis said. "Now ... maybe we're back to two suspects instead of the white-shirt third suspect."

However, Davis said that "the chances are even increasing" of "further involvement" by others. He refused to give details, saying, "We have to be very, very careful at this point of what we release."

No arrests have been made and no other suspects beyond the dead gunmen have been identified.

The gunmen belonged to a clique of outsiders at the school called the Trenchcoat Mafia.

In an interview with The Denver Post, a member of the Trenchcoat Mafia who knew the gunmen described life for members of his group as "hell ... pure hell." He said that athletes at the school called him "faggot," bashed him into lockers and threw rocks at him as he rode his bike home.

"I can't describe how hard it was to get up in the morning and face that," the 18-year-old, who demanded anonymity, told the paper.

But he said he did not know of his friends' violent plans.

"I'm not saying what they did was okay," he said. "But I know what it's like to be cornered, pushed day after day."

Correspondent Martin Savage, and The Associated Press contributed to this report.