Authorities have released the name of the Missoula firefighter who died on Wednesday while battling a wildfire. The Missoula County Sheriff's Office reports that Trenton M. Johnson, 19, of Missoula died after a tree snag fell on him. The incident happened at around 5 p.m. while Johnson was fighting the Florence Fire north of Seeley Lake. Johnson was flown to Missoula but was later pronounced deceased at a local hospital. He was an employee of Grayback Forestry. The Sheriff's Office is investigating the details surrounding the fatal event, according to spokeswoman Brenda Bassett.