Lieutenant Sean Williamson, a 27-year veteran of the Philadelphia Fire Department, was killed after a portion of a building collapsed, after an early morning fire. PHILADELPHIA - Law enforcement officials and agents with the Bureau of Alcohol, Tobacco and Firearms are set to announce the arrest of a suspect in connection with a fire in Fairhill that led to a building collapse that killed Philadelphia firefighter Lt.
Sean Williamson. Information about the suspect will be announced Tuesday afternoon at 4:30 p.m. at the ATF headquarters in Philadelphia.
The news comes one day after mourners gathered at a funeral mass for Williamson, 51, who was killed on the morning of June 18 when part of a building he was inspecting collapsed after a fire.
Lt. Sean Williamson, who spent 27 years working for the Philadelphia Fire Department, was laid to rest Monday after he was killed in a building collapse in Fairhill earlier in June.Authorities say a commercial building on the 300 block of West Indiana Avenue was reported to be on fire around 2 a.m.