I need a good, highly skilled detective

After disconnecting the call, Daniel Brooke walked to his study and locked the room. He sat straight on his chair, clenching his fists tight, which were placed on the table. His solemn gage was firmly fixed on a certain point on the opposite wall. He was thinking about how to deal with Mr. Mayor. He couldn’t even touch a single strand of his hair without strong evidence and this was not something that Derek could do. For this work, he must hire a professional detective who had the guts to go against Mr. Mayor. But he didn’t know anyone like this.