That link provides a pretty good explanation of felony murder; however, it fails to point out that there also must be an element of foreseeability to the death. One must be able to conclude that the death was reasonably foreseeable from the actions of the defendant. In this case, the death of mercenary spectators in a helicopter crash is too distant IMHO. If a cop or another driver had died during the chase, that would be a clear case of felony murder. He may be charged with felony murder because it's such a high profile case, but I don't see it sticking.