PHILADELPHIA — Two Pennsylvania State Police troopers and a civilian were killed in a car crash on I-95 early Monday morning in what law enforcement officials described as a possible DUI incident. Around 12:45 a.m., troopers responded to calls about a man walking in a southbound traffic lane near Lincoln Financial Field. As police tried to bring the man into custody and out of harm’s way, a vehicle traveling at a high speed attempted to pass them in the shoulder lane, fatally striking both troopers and the civilian, according to state police. Captain James B. Kemm, commanding officer for the s…