LAS VEGAS -- A convicted accomplice in the O.J. Simpson armed robbery who testified against the fallen football star has been jailed and could be sent to state prison for failing a drug test, his lawyer said Thursday.

Charles Cashmore, 41, was taken into custody on New Year's Eve and faces a hearing before the judge who let him and three other men remain free after sentencing Simpson and co-defendant Clarence ''C.J.'' Stewart to long prison terms.

''He violated probation,'' attorney Edward Miley said, citing a state Division of Parole and Probation report that he said showed Cashmore had methamphetamine in his system. ''The state intends to impose the suspended sentence.''

In December, Clark County District Court Judge Jackie Glass handed Cashmore a suspended one- to three-year sentence, allowing him to remain free on three years' probation if he abided by strict behavioral rules.

Miley said a hearing before the judge had was not immediately scheduled.

Cashmore, a journeyman laborer and native of Billings, Mont., was the first of four accomplices to take a plea deal in the case, after initially facing the same charges as Simpson and Stewart. He pleaded guilty in October 2007 to a reduced charge, felony accessory to robbery.

He told a jury he met Simpson for the first time minutes before joining Simpson and four other men in the ill-fated hotel room confrontation with two sports memorabilia dealers in September 2007.

Cashmore provided testimony that two other men in the group brought guns.

That undercut Simpson's insistence that no one brought guns and that he was only trying to retrieve personal mementos and family heirlooms that had been stolen from him.

after his acquittal on murder charges in the 1994 slayings of his wife, Nicole Brown Simpson, and her friend, Ronald Goldman, in Los Angeles.

The Las Vegas jury found Simpson and Stewart guilty Oct. 3 of all 12 charges against them, including kidnapping, armed robbery and assault with a deadly weapon.

Glass sentenced the 61-year-old Simpson on Dec. 5 to nine to 33 years in state prison. He is housed at a medium-security prison in Lovelock in northern Nevada.

Stewart, 54, was sentenced to 7½ to 27 years. He is housed at High Desert State Prison in Indian Springs.

Three other admitted accomplices who turned state's evidence in the case -- Michael McClinton, Walter Alexander and Charles Ehrlich -- each pleaded guilty to felony charges and were sentenced to varying terms of probation.