By | December 24 2012 11:08 AM

UPDATE (Dec. 24, 3:09 p.m. EST) -- The Rochester Democrat & Chronicle identified the deceased firefighters as Lt. Mike Chiapperini, 43, a volunteer firefighter and the Webster Police Department's public information officer, and Tomasz Kaczowka, a 911 dispatcher believed to have been in his early 20s. The shooter, who was found dead from an apparent self-inflicted gunshot, was identified by Webster Police Chief Gerald Pickering as William Spengler, 62, who served a 17-year-sentence for murdering his grandmother in the 1980s and '90s. Pickering said seven homes were burned in the fire and that the shooter's sister is missing.