I've noticed a lot of Tilda-love here, so just in case you haven't seen it, may I commend you to The Deep End? Tilda stars with Goran Visnijc (yes the ER guy, but he can actually act) trying to deal with a son who may be a murderer. IMDB tells me it's a remake of the 1949 Columbia film, The Reckless Moment, so that may be an additional incentive.
Plopped this right on my to-watch, thank you.