The Importance of Using a Preservation Letter
Many times in investigations, investigators will ask the providers for specialized reports such as PCMD, RTT, TrueCall, and NELOS. But sometimes the probable cause for a search warrant hasn’t been developed until weeks or months after the crime has been committed. By that time, some of these reports will no longer be available to you. These specialized reports have been key in solving crimes when the normal CDRs did not provide much value. That is why it is extremely important when a suspect phone number has been identified to send the preservation letter to their carrier as soon as possible.
Here are some examples of record retention schedules from the providers:
AT&T NELOS: 90 days
Sprint PCMD (LTE/EVDO): 10 – 14 days
Sprint PCMD (Voice): 90 days
T-Mobile TrueCall: 90 days
US Cellular RTT Data: 3 days
Verizon RTT Data: 5 – 7 days
Verizon SMS Content: 3 – 5 days
Here at CellHawk we make writing a preservation letter written simple! Visit our free resource Support@Hawk and use our phone search tool to query the number you are interested in. We will identify the current carrier of the number for you! To generate the request click on the preservation letter template. A preservation letter will be automatically generated and will have all of the most up to date language to ensure you get the most out of your legal process – you only have to input a start date and end date.
With a few clicks, you have generated a preservation letter for your case and saved valuable data!