Allegheny County District Attorney Stephen Zappala talked exclusively with Channel 11, revealing what investigators believe might have been behind last month’s explosion that killed two steelworkers and injured at least 10 others at Clairton Coke Works.
PREVIOUS COVERAGE >>> 2 dead, 10 injured in explosion at US Steel Clairton Coke Works plant
The deadly blast happened on August 11 and claimed the lives of 52-year-old Steven Menefee and 39-year-old Timothy Quinn…