Just because his cell phone was at Lowes doesn't mean HE was at Lowes. Just speculating here. That long legged perp running from the car...maybe it IS DW. Maybe not.
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This occurred to me as well, we don't really know that he was at Lowe's.
My daughter pulled this stunt when she was in high school. Telling me she was going to the gym to exercise, she put her cell phone in a locker there in case I tried to track her, and then took off somewhere she was not supposed to be. I found out and I was not a happy camper, took her cell phone away for a period of time which was like ripping her heart out of her chest.