Of course not. This would be standard procedure in any police department.
They certainly know who he is, and by tomorrow, they may be ready to release his name.
It already appears that he is a deranged Left-winger trying to look like a "Tea Party Republican". And even some Leftists are vehemently opposed to Planned Parenthood. The shooter is not going to fit anybody's narrative very well.
If the announcement of the name goes past Monday then something is seriously wrong.
The Daily Mail is quoting CBS with an identity of Robert Lewis Dear.