This is according to a village elder in mohib banda. Seems very plausible to me as the extent of infiltration of jihadists ideas runs deep in pakistani society, especially its elite.
"He was a jovial type, very active and playful. But after his marriage some three years ago, he began to change. He moved his base from Peshawar to Karachi, grew a beard, and grew quieter and withdrawn," says Faiz Ahmad, a local elder.
"I think he must have come in touch with extremists who infiltrated the Pakistan air force in the mid-2000s."