Brian Higgins testified that his "best friend" Matt Kelsch is a federal digital forensic expert who showed him how to use federal resources to exclusively extract his messages with Karen Read before destroying his SIM card and tossing his phone. Kelsch testified at the Aaron Hernandez trial about how destroying a SIM card is an effective way of making sure investigators don't find deleted text messages: https://tbdailynews.com/canton-coverup-part-360-brian-higgins-best-friend-atf-forensic-expert-matt-kelsch-testified-in-aaron-hernandez-trial-about-destroying-sim-cards-to-hide-deleted-messages/