A TEC-DC9 semiautomatic handgun RELATED VIDEO CNN's Don Knapp looks at the Columbine students' first day back in class Real 28K 80K Windows Media 28K 80K Investigators say Klebold and Harris probably acted on their own. CNN's Tony Clark updates the state of their case. (May 3) Real 28K 80K Windows Media 28K 80K A final memorial service was held in Colorado on Sunday. CNN's Charles Zewe was there. (May 2) Real 28K 80K Windows Media 28K 80K

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Listening After Littleton

IN-DEPTH SPECIAL:

Are schools safe?

May 3, 1999
Web posted at: 10:27 p.m. EDT (0227 GMT)

In this story: Police: Gun supplier didn't know of attack Gunmen's friends urged not to return Anti-depressant found in Harris' system Victim's family plans lawsuit RELATED STORIES, SITES

LITTLETON, Colorado (CNN) -- A man who allegedly supplied a semiautomatic handgun used in the Columbine High School slayings was arrested on a felony weapons charge Monday afternoon.

Mark Edward Manes, 22, of Littleton, who once attended Columbine, faces a charge of providing a handgun to a minor, said Steve Davis, a spokesman for the Jefferson County Sheriff's Department.

"He was the last person who had (the gun) before it was supplied to one of our gunmen," Davis said.

As the arrest was being made, Columbine's nearly 1,900 students were back in school for the first time since Eric Harris, 18, and Dylan Klebold, 17, killed 12 classmates and a teacher in a shooting and bombing rampage on April 20, before taking their own lives.

Because Columbine is still a crime scene, classes are being held at Chatfield High School, about three miles away. Though the two schools are traditional rivals, Chatfield students decorated their building with banners welcoming the students from Columbine.

"If we can do anything to help them, we're happy to do it," said Amber Mancuso, a Chatfield junior. "I think it's hit all of us hard, all of us have friends there. When we found out, probably half the school was crying."

As the investigation continues, Davis said authorities are "leaning toward" the conclusion that Harris and Klebold were the only gunmen inside Columbine during the attack, though they still haven't ruled out the possibility that others were involved.

Police: Gun supplier didn't know of attack

Manes' lawyer, Robert Ransom, brought him in to surrender, and he was released on a $15,000 bond pending a May 10 court appearance when he is expected to be formally charged.

Davis said Manes supplied the gun, a TEC-DC9, to one of the gunmen, but he did not know whether it was provided to Harris or Klebold. An employee of a pizza parlor where both gunmen worked was a go-between with Manes but has not been charged, Davis said.

Under Colorado law, the weapons charge carries a possible sentence of two to six years in prison and a fine of up to $500,000.

Lt. John Kiekbusch, the lead investigator in the case, told CNN that authorities do not believe Manes, who attended Columbine for two years, knew how the students planned to use the gun or had any prior knowledge of the attack.

Ransom said Manes was "horrified" by the slayings.

"I would like to say he has followed the path of integrity from the beginning," Ransom said.

Three other weapons -- two rifles and a shotgun -- were also used in the Columbine attack. Police say those weapons were purchased by Klebold's girlfriend shortly after she turned 18. She won't face charges, however, because it is not illegal in Colorado to provide those types of weapons to juveniles.

Gunmen's friends urged not to return

Columbine students returned to school at nearby Chatfield High

Columbine's nearly 2,000 students will complete the final 10 days of the academic year at Chatfield in a split session arrangement which schedules Chatfield students in the morning and Columbine students in the afternoon.

Eight to 10 students who were friends and associates of Klebold and Harris were asked to consider home schooling or other options, rather than finishing the year at Chatfield. School district spokesman Rick Kaufman said the suggestion was made "primarily for their well-being and because it's a very uncomfortable and difficult time for everyone involved."

However, only three of the students went along with the suggestion, with the rest opting to join their Columbine classmates at Chatfield.

Before Chatfield opened for the day, dozens of parents and students stood on a nearby embankment to say prayers. Uniformed sheriff's deputies, police officers and five guards patrolled the school grounds, and students had to show identification before filing into the school.

Anti-depressant found in Harris' system

Earlier in the investigation, authorities said an initial autopsy found no drugs -- illegal or prescription -- in the bodies of the two gunmen.

On Monday, however, authorities said further tests revealed the presence of the anti-depressant drug Luvox in Harris' system.

The amount was "in the lower-middle therapeutic range," the Jefferson County coroner's office said.

"Many prescription medications are not identified on standard screening tests," coroner Nancy Bodelson said in a statement released by her office. "Further testing for specific medications or chemicals is done only when indicated."

Just five days before the attack, the Marine Corps rejected Harris as a recruit because he had been prescribed Luvox, which is generally prescribed to treat obsessive compulsive behavior.

Family of victim plans lawsuit

Geoffrey Fieger, the former attorney for Dr. Jack Kevorkian, said he will file at least one lawsuit on behalf of the family of Isaiah Shoels, one of the students killed at Columbine.

Fieger said he will start by suing the parents of Klebold and Harris. He said he may also file lawsuits against gunmakers and anyone who sold the weapons to the gunmen.

"I can't believe that two people, two young kids in high school, could amass that kind of arsenal and the parents say they don't have any responsibility to know or to investigate," Fieger said.

Jefferson County school officials also announced they were banning trench coats from every school in the district, which has 89,000 students.

Harris and Klebold were members of a group called the Trenchcoat Mafia and were wearing trench coats at the time of the attack.

Correspondent Charles Zewe and The Associated Press contributed to this report.

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