Too obvious
SPOILER:
I thought the killers identity was way way too easy to guess right from the start.
Why, you ask. Well, in the beginning, before the painting is stolen, its owner, whose name escapes me, upon revealing the painting says "Sorry to make an old friend jealous". Then, a while later, you hear Drake talking about the dead person as his friend.
Other points about this film:
They never explain how Drake manages to turn off the lights in the aeroplane.
The two fumbling cops joke gets old really quick. Personally I thought they were annoying as hell after the first 10 minutes.