Anyone else besides me, think that KL's friend talk to her employers for one or both reasons:
1. she was truly worried about her friend being asked to do this
2. her friend confessed to helping PF, whether it was hiding the phone and sending texts, or helping with the murder itself as well as the phone and texts.
and for my last BOMBSHELL, which prompted the lawyers to make that tough phone call to the FBI- maybe her BFF helped her get rid of the phone and send the texts. Who knows, maybe she helped hide evidence, too, thought about it afterwards, went hysterical and begged her bosses for legal advice. She might not have known at the time that Kelsey had been murdered, or her name, at the very least.