Maybe that relative of yours needed to have spent more time in the rehab facility than he did. Taking him to a church isn't exactly the most logical option. Prayer would be helpful, no doubt, but actual work would go a long one. He's obviously a chronic drug addict, it shouldn't be expected that he becomes clean overnight.
These things take time.

As for the guy who got picked up for a crime he had no idea about, it's just unfortunate. There are lots of people in prison who suffered same fate. It's just terrible how very inhumane people(read as 'the force') can be. Good thing he got out.