I am sorry, i know i am just going to act like an a$$, but this is what i have to say.
Just uncalled for apology when the family might have forgotten the loss.
He should have responded to media agency, to give correct details if they were speculating wrong about the incident, rather than contacting family and telling them the pilot was begging for mercy. In this particular article (if this is the correct script of his letter), no where a textbook interception of a civilian plane is mentioned but a cold blooded sabotage though. If the Indian plane was spying on the area then best option could had been to intercept and force it to land onshore or shot down if pilot refused to cooperate.
Every thing is fare in love and war and the war is still on and hostility is still not yet over. Quite an interesting curettage of old healed wounds.
If i was the Pakistani pilot and have to say sorry then it had been an unconditional, without too much of reasoning.