I expect the cell tower location data to be challenged by the defense for technical reasons. There was an issue with the cell towers located in that area durning that time.
I lived in Rancho Cucamonga during that time frame and became aware of the issue due to a dispute with my cell carrier Sprint.
At the time Sprint shared towers with the same carrier as CM had which was Verizon. Beginning in 2009, in up until Sprint terminated my account in January of 2011, the cell towers in the area were malfunctioning, this caused the 3 phones associated with the account to constantly drop and then reconnect to distant towers, this behavior would then register on my billing statement as roaming even though the phone was stationary, which gave the appearance that I had traveled from one area to another.
My Sprint contract allowed for free unrestricted roaming so I wasn’t too concerned since I wasn’t being charged for the roaming and the phones worked well once they were out of the area.
Apparently, this was not okay with Sprint, because in January of 2011 they terminated my service due to excessive roaming which was occurring even though the phones were stationary in RC.
After I received the termination letter I called and spoke with Sprint customer retention, they explained that they were aware of the problem and blamed it on the Verizon towers that Sprint used in the area, but essentially said, too bad, the roaming fees we’re paying the other carriers preclude us from honoring the contract with have with you. I happened to find a copy of that letter and uploaded it for verification.