Complex sentence: The fact that Doniphon shot the man from a discreet distance without warning means that it was more murder than an actual gunfight, unlikely though it is, Doniphon might face murder charges on those grounds.
Split into simpler sentences: The fact that Doniphon shot the man from a discreet distance without warning means that it was more murder than an actual gunfight. Unlikely though it is, Doniphon might face murder charges on those grounds.