Because he is not tech savvy. Most criminals have no idea about cell phone pings. They think about things like toll roads, and phone calls or texts but not pings.
Thank god. Pings were critical in catching my cousin's husband. He planned everything out. Thought he was so smart. But the blunders got him. When things don't add up, stories conflict, pings put you in different places. ..
If PF hadn't been so dumb about the pings. He would have a good defense. Nothing to back up KK's story. But guess what KK was in idaho and PF and KB's phone were pinging at his ranch, on the highway, etc. Then on Nov 24- god bless them- PF, KK and KB's phone all pinged together near Nash Ranch. Ping, Ping Goodnight PF!