EL CAJON, Calif. (AP) — DNA evidence from a licked envelope led to the arrest Tuesday of an Arkansas man accused of killing two people in Southern California nearly four decades ago.

Federal agents and detectives from El Cajon arrested Clyde Carl Wilkerson, 63, at his home in Benton, Ark., and charged him with murder and sexual assault, police said.

Authorities in El Cajon said they will seek his extradition to California.

Wilkerson is accused of strangling Cheryl Burnett, 19, with a curtain cord in her apartment June 6, 1965, while her 2-year-old son slept in the next room.

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He also is accused of breaking into another home two weeks later, killing Louis Mercer, 62, and sexually assaulting his wife, Lola Mercer, 57.

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