Watch Secuestrados (Kidnapped) instead
I started to watch Trespass the other night and immediately spotted the similarities to Miguel Ángel Vivas' 'Secuestrados', and while it was obvious that Trespass was an attempt at an American remake (although I don't think officially) that is where those similarities ended.
Never since the American remake of The Vanishing (Spoorloos) have I seen such bastardising of the original formula.
My advice is to simply ignore Trespass and watch Secuestrados, if you feel that you really must watch both make sure you watch Secuestrados first and then prepare yourself to witness what Hollywood do best, 'rape'.