after her cell phone stopped sending a signal before 11:30 on the night she died, it had mysteriously turned on about four hours later and pinned of his cell phone -- cell tower near the soccer field. when that happened, data showed isaiah was miles away. >> at the time her phone came back on and started traveling, it was nowhere near isaiah hagan. he was in a different county so he could not of been pinging of the same tower. >> and he thought it meant someone else had halee's cell phone the prosecution insisted isaiah had the phone all along. >> it looks like it powers pack the at the soccer field but we have the theory that when you power your phone off, hits in the last hour it was off when it powers down. >> is that exact sensory theory? >> it is a theory but we have found zero evidence there was anyone else involved other than isaiah hagan.