Reports of an arrest may be been premature.
If this person has cohorts why tip them off that they might be compromised? Say nothing and see who comes out of the wood work.
You're right. OTOH I thought the confusion from the news media might cause them to foolishly break cover like a covey of quail which might also serve a purpose. Who the heck knows. Just hope we catch them.
I honestly think it just a jumpy press; report, then confirm. Same thing happened in CT after the shooting. It's pathetic.