Butte County authorities have circumstantially identified the three victims found shot to death inside a burning car earlier this month.
The victims are believed to be Colleen Joanne Lowe, 46; her son, Roland Allen Kadier Lowe, 15; and Richard Lynn Jones, 17, who was not related to the other victims. They are all from Sacramento.
The Butte County Sheriff's Office tentatively identified the victims based on information gathered by detectives, but officials said they are still awaiting confirmation through DNA.
The victims' bodies were discovered by firefighters battling a vehicle blaze in the Magalia area of Butte County in the early morning of June 13. The car was discovered to have been recently reported stolen in the city of Sacramento. Two bodies were found in the trunk and the third in the backseat, the Sheriff's Office said.
On Thursday, detectives arrested 72-year-old Donald Clark on suspicion of arson and three counts of murder, according to the Sheriff's Office. He was booked into the Butte County Jail.