An old, sick bloke dies and they decide to launch a murder investigation?
WTF would anyone murder Arafat? Wouldn't have been the Israelis. He managed to achieve virtually nothing, weakened the Palestinian independence movement by promoting corrupt cronies, created division and resentment between Palestinian factions, and inspired hatred and fear in Israel, encouraging people to vote for extremist idiots. The Israelis had a vested interest in keeping him alive; I'm surprised they didn't stick him on eternal life support like they did with Sharon.