Main suspect in Lahore blast still at large More suspects rounded up from Sindh, K-P Site of the explosion in Johar Town. Photo: EXPRESS LAHORE: The Counter-Terrorism Department Punjab (CTD)’s investigation into Johar Town car blast was stalled on Friday after the police arrested a few petty criminals but could not find a trace so far that could serve as a link or lead to involvement of a militant organisation or agency. The investigation was pinned around David Paul, the suspect arrested at Lahore airport after being offloaded from a Karachi-bound flight, as he was the last link in the ownership of a black Corolla car, believed to be used in the bombing on Wednesday.