Driven to Kill (2009)
'They took his daughter. So he's taking them down.'

"An ex-Russian mobster who is now a crime novelist must confront his past when his family is targeted by violence." So, Seagal doesn't play a cop or cop-like figure, however he is a reformed bad guy (I guess), which is I suppose a close second (it would make him 'troubled' anyway). However his family being targeted is an important point. Also mobsters are kind of like terrorists, and I assume it is mobsters who are targeting his family. The working title of this movie was 'Ruslan' (seriously, a Russian guy named Ruslan?) however the new title follows the three word rule perfectly so the change is certainly excellent. The cover also features Seagal holding a gun and behind him there's an explosion. A tour de force!