My guess is that they went ahead and explicitly asked if they could search it and SS, being the mastermind that he is, said yes, thinking that the factory reset would protect him. If that’s the case, then it’s admissible, no prob. In fact, under Florida law, I
think just plain handing your phone over to law-enforcement is implied consent but I’m not sure about that.
Here’s a lawyer’s website that talks about it a little bit. I’m currently digging through the actual statutes to get more clarity.
Choice quote from link above: “But this doesn’t mean all cell phone evidence gleaned without a warrant is inadmissible. There is a loophole: Consent. If you agree to simply hand over your phone to an officer because he or she asks, you don’t have the right to later challenge a violation of your rights. You voluntarily consented to the search.”