MURRAY, Utah (AP) _ A fugitive wanted in the poisoning death of a Las Vegas beauty contest winner was arrested here, authorities said today.

Murray Police Sgt. Bill Brusik said Steven Paul Mack was taken into custody about 10 p.m. Tuesday after police stopped him in his car about half a mile from his home in this Salt Lake City suburb.

Mack, a convicted forger and burglar who served two prison terms and was paroled in 1985, was being held without bail today in Salt Lake County Jail on a felony homicide warrant issued in Sacramento, Calif.

Brusik said Sacramento detectives were expected to arrive today to question Mack and begin extradition proceedings.

Mack, 39, is sought for questioning in the February 1987 slaying of Karen Grace Winslett, 21, of Carmichael, Calif. Winslett won the title of Miss English Leather in Las Vegas, Nev., shortly before disappearing Feb. 19.

Her decomposed body was found 12 days later hidden under the rear hatchback door of her sports car, parked behind a Sacramento motel.

Sacramento detectives said she died of a large dose of Percodan, a pain killer for which Winslett had no prescription. She had no health problems, was not suicidal and had no background of drug abuse, authorities said.

Detectives concluded she had been poisoned, and said Mack was linked to the crime by physical and other evidence they would not detail.

Sacramento police also said Mack is a suspect in a similar slaying of a 19- year-old Annette Huddle in Marion County, Ohio.

Brusik said police discovered Mack's identity during an unrelated forgery investigation involving Sean Paul Lanier, the name Mack purportedly used for the four or five months he had been living in Murray.