Diamond Girl, it happened in New Hartford, New York after a church service.  The church is in an old school building that was also used as living quarters for some of the families.  Pictures that I saw in the newspaper show a gate around the yard chained and locked. 

Apparently 19 year old Lucas Leonard wanted to leave the church and was subjected to a "counseling session" after a church service.  The pastor, along with his mother and father and other church members, beat him to death in that "session" held inside the church.  I've seen reports that the "session" lasted from Sunday night into the wee hours of Monday morning.  His 17 year old brother was also beaten and seriously injured and hospitalized. 

I'll try to post a link of the story I read that seemed to contain the most information.