No, I really think they are stalling to let the situation play out for the slain minister's family. Imagine unleasing some terrible accusation against him (which looks like will happen) before he is even buried.
txr, you make a very good point...the police are keeping quiet FOR NOW because they know that if they release the motive (and it is AGAINST the husband...i.e. child molesting) before the funeral that people would be repulsed and not show up...i would think that if the motive was AGAINST the wife that they would have released it already
...they will release it shortly after the funeral