Besides wearing bad toupees, dead actor Robert Pastorelli is now under inverstigation if you want to believe that. Pastorelli apparently offed his girlfriend six years ago...

Hollywood- Actor Robert Pastorelli, best known for his portrayal of the screwy house painter on "Murphy Brown," reportedly was under investigation for killing his girlfriend when he died last year.

According to an episode of "Inside Edition" airing tomorrow, a law enforcement source said the 1999 death of Pastorelli's girlfriend, Charemon Jonovich, 25, "was in no way an accident or suicide. ... He committed the murder."

Pastorelli, who played Eldin the painter on the popular sitcom, died of a drug overdose last March at age 49.

Jonovich, who had a daughter with Pastorelli, was found shot in the head at the actor's Hollywood Hills home. Her death initially was investigated as an accident or suicide.

Five months after Jonovich died, the Los Angeles coroner changed her official cause of death from "undetermined" to "homicide" based on further police investigation, the show says.

The law enforcement source told "Inside Edition" that Pastorelli knew of the investigation. "We were planning to arrest him by the beginning of summer," the source said. "We were tying up a few loose ends."

Pastorelli, who appears in the new film "Be Cool" with John Travolta and Uma Thurman, had an extensive TV career outside "Murphy Brown," including appearances on "Miami Vice" and "Hill Street Blues." His credits also include 1987's "Beverly Hills Cop II" and Kevin Costner's 1990 flick "Dances with Wolves."