Boston mosque leader disavows Marathon jihadists -- then why didn't he turn them in?

From the Associated Press:

A leader of a Boston mosque disavowed the Marathon bombing during an interfaith service on Thursday. Anwar Kazmi acknowledged that the bombing suspects had prayed at the mosque, but called the attack 'a grotesque perversion of our faith.'

Then why didn't he turn in the Tsarnaev brothers when the FBI released their pictures? The whole world was watching. They must have known that the pictures were released, and they must have known who the bombers were. Yet they did nothing.

http://www.jihadwatch.org/2013/05/boston-mosque-leader-disavows-marathon-jihadists----then-why-didnt-he-turn-them-in.html