Rob Watson: "The first lawsuit to be filed since the killings"

Geoffrey Fieger, known for representing assisted-suicide advocate Jack Kevorkian, is filing the lawsuit on behalf of the Shoels family, whose son Isaiah was killed when Dylan Klebold and Eric Harris attacked fellow students with bombs and bullets last month.

The suit alleges that the parents of Eric Harris and Dylan Klebold were negligent in their supervision of the two teenagers.

"Justice demands a full accounting of everyone who significantly contributed to this massacre," Mr Fieger said. "Klebold and Harris could not have developed and executed their violence without the negligence of the parents and possibly others."

Preventing another Columbine

Speaking at a news conference with Isaiah Shoels' parents at his side, Mr Fieger said the case was not about the money.

He said he was about remembering Isaiah Shoels and changing American society to make it more responsible for its children and the way they grow up.

"We're at a risk that an entire generation of natural-born killers is being nurtured even as we gaze in horror at the senseless and remorseless acts of violence," he said.

Mr Fieger said he might also expand the lawsuit to include school officials, gun manufacturers and any accomplices the two gunmen may have had.

Attorneys for Wayne and Katherine Harris, Eric's parents, did not return calls seeking comment, and a spokeswoman for the law firm representing Thomas and Susan Klebold, Dylan's parents, declined to comment.