LOS ANGELES -- A convicted sexual predator facing a capital murder charge in the killing of a young boy in 1981 has been charged with the murder of a second boy, Los Angeles County District Attorney's officials said Friday.

CBS Los Angeles reports that Kenneth Kasten Rasmuson was charged on Oct. 20 with capital murder in the 1986 death of a 6-year-old boy, identified by prosecutors as Miguel Doe, whose body was found in a remote creek bed near his home in Agoura Hills.

Rasmuson was charged in March with the murder of 6-year-old Jeffrey Vargo, who was last seen alive near his Anaheim Hills home as he rode his bike to a fireworks stand on July 2, 1981. Vargo's body was found by construction workers in Pomona the next day, and the Los Angeles County Coroner's Office determined the boy had been strangled to death.

Rasmuson, who was convicted in 1981 in Santa Barbara for sodomy of a teenager, was arrested at his Idaho home after DNA linked him to Vargo's murder. CBS Los Angeles reports that Rasmuson had been identified as a potential suspect in Miguel Doe's murder, but until recently investigators did not have enough evidence to move forward on the case.

However, homicide detectives reportedly began re-examining the Miguel Doe case after Rasmuson's arrest for Vargo's murder. The station reports that Los Angeles County Sheriff's officials said DNA links Rasmuson to Doe's death.

Prosecutors reportedly say Miguel was killed during the commission of a lewd or lascivious act.