And a lot of suspiciously timed Phone Calls were hardly proof of murder, but detectives believed those calls might be able to tell the story of what happened the night fred was killed. Investigators got the locations of all the Cellphone Towers in the area and then did whats called a Tower Dump. Cestare a Tower Dump shows you every Phone Number in and out of a particular tower and the times that it occurs, how long the call lasted, the Phone Number it connected with or called to or called from. Narrator forensic analysts were able to pinpoint almost exactly sherry and tims locations as they called each other the night of freds murder. So, they could put the signal down into the size of about a car, i would say about 6 feet by 10 feet. I could say that this person was accurately within that area. Narrator sherry and tim had five Phone Conversations around the time of freds murder