LANCASTER, Calif. (AP) — An 18-year-old man was charged Friday with murdering a woman and her three young daughters, then setting fire to their home, and authorities say they consider the man a "person of interest" in the death of a 90-year-old woman whose body was found in her burned home in May.

Corey Lynn King has been jailed since surrendering to authorities Wednesday, a day after firefighters found the bodies of the woman and her three daughters in their burning home in Lancaster, a city about 70 miles north of Los Angeles.

The prosecution's complaint identified the slain woman as Sonya Durfield Harris. The county coroner's office previously listed her as Sonya Durfield, 43. The discrepancy was not immediately explained. Her daughters were identified as Ebony Horton, 13; Melina Harris, 11; and Kayla Clark, 9.