Didn't watch the ep but the new suspect seems odd since he was the first suspect. I thought they had cleared him. Or was it just another case of Linden and Holder doing a shitty job?

It would be really weird if it was him. Would make more sense if it was one of the underlings, probably the girl. She had access. She was jealous. She set up the meeting. The other guy seemed quick to cut Bennett loose so it could be him too.