The suspect, Raymond Lee Oyler, 36, is already under arrest on suspicion of setting two other wildfires over the summer. Investigators sought to charge Oyler with murder, arson and use of an incendiary device, Undersheriff Neil Lingle said. A woman who answered the phone at the home of Oyler's mother said she had no comment. The blaze was the deadliest for firefighters since 14 were killed in July 1994 near Glenwood Springs, Colo., according to the National Interagency Fire Center statistics. Riverside County prosecutors had not yet filed any charges Thursday against Oyler, who was expected to appear at his first court hearing on Thursday. Oyler remained jailed in lieu of $25,000 bail.