State of law in Gaza ?

I just wanted to point out these articles about the assassination of Moussa Arafat: Libé, Haaretz (2), NYT...
(btw they don't seem to agree on something as simple as his age).

I can't really understand all the implications and reasons around that, but having a man being assassinated by a little army without any opposition from the security forces does not sounds especialy good. Maybe a little trial for corruption would have been better before the execution, no ?