[@Balthazar007] Well, the phone is being cracked by a Capsule Corp employee when they get to the home office.  Apart from information on the phone leading to the implication that the Martian Mining Corporation put the hit on Niko, and further info that there is something not directly spoken of going on with Mars, the fact is that anyone of the Brief family could get the word to the right people, "Hey, you know that runner-up from the military that we were looking for?  Guess who just walked in our front door...".