HENRICO COUNTY, Va. --The sentencing for Michael Elijah Adams, the admitted serial killer known as "Dirty Mike," is now on hold after he was expected to admit to a brutal killing at a homeless camp nearly 10 years ago has been put on hold.

Officials with Henrico County's Commonwealth`s Attorney's Office said Adams was to be sentenced to life in prison after he planned to plead guilty to capital murder in the June 2006 death of Robert Allen "Bobby" Chassereau.

There has been no word on when the trial will be rescheduled.

Adam’s, who admitted to the murder of Chassereau in a March jailhouse interview with CBS 6 reporter Mark Holmberg, will plead guilty Thursday afternoon. Chasseraru was found beaten to death in a homeless camp near the Acca train-switching yard in 2006.

Henrico County cold-case police Detective Thomas Holsinger said he believed robbery of drugs was the motive, but Adams said he just didn't like Chassereau's lifestyle.

During the March jailhouse interview, Adams admitted to more than 16 murders of fellow train drifters.

He said some of them were during sour drug deals, or because he felt the victim disrespected "the code" or the colors of the Freight Train Riders Association. That’s a group of hard-rock train jumpers and drifters (now mostly defunct) started by disassociated Vietnam veterans, Adams said.

The native of Michigan, is already serving 15 to life for the killing of train-rider John Owens in Placer County, California. He's also a suspect in murders in Texas and Washington State, among others.

"I'm proud of what I did," he said. He believes he provided a public service by executing some of the dregs of society, by being a cold-blooded enforcer. "I'm a necessary part of society."

Adams said he doesn't want the death penalty. Nor does he want to do his time in the rougher "gladiator" prisons in California.

Virginia, he said is "retirement. Three hots and a cot."