I guess its possible but I kind of doubt it.
There have been some issues over the years with scanners but they haven't encrypted anything. During the Furgeson protests in the city, a couple years back, a reporter was tweeting play by play. The Police Department demanded publicly for them to stop which they didn't. They didn't encrypt anything after that.
During the riots, 100% of the communications and even department level comms were in the clear. Since then, they haven't encrypted even though media publicly released comms on the airwaves.
Even after the riots, with the threat of issues because of the trails, they still didn't encrypt anything.
The system has such minimal encryption on a couple of the Vice/NARC and the Executive protection channel talkgroups but they aren't strapped encrypt and it is up to the user and 99.99% it is in the clear.
From what I have seen with the Commish, I kind of feel that he is pro media/public communication so I kind of doubt he will force encryption but with a new Mayor next year and likely a new commissioner, who knows?