Here's a scenario/motive to ponder...
BB finds texts or LinkedIn messages between CW and MB. He contacts CW and threatens to tell CWs wife, unless he does something for him. A blackmail situation.
They develop a plan and a date, and set the wheels in motion (perhaps the two weeks prior to the murder when MB was allegedly acting strange and stopped going to the gym). CW tells her there is a bad guy of some sort at her gym to set up suspicion before the crime is even committed. MB confides in BB about the bad person at the gym and he starts giving her safety reminders (BB and his mother have been open about concerns for her safety prior to the murder).
It would take CW an hour to get home after the crime, plenty of time to ditch the swat gear and clean up. He is working a 9-5 now, so leaving extremely early in the morning for a 3 or so hour workout or training session before work would not be impossible.
Soon after the murder, BB starts throwing suspicion towards CT as a diversion. His family buys it and starts talking publicly, subtly alluding to the perp being a woman. Everyone (media included) catches on quickly and attention overwhelmingly shifts toward the T's. Mission accomplished.
MOO, of course