Updated:Tear gas may have started a fire at this cabin, where a fugitive ex-cop is thought to have been cornered. The building burned down during a shootout between police and a man believed to be Christopher Dorner. The 33-year-old is wanted for a killing spree targeting police and their families. Remains found at the cabin are thought to be Dorner's - although no formal identification has been made. Police are investigating the cause of the blaze.