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Don't get to excited about tower dumps, i have had to look at them and i knew the numbers I was searching so you would think it would be easy, but no it takes days. They are usually in an Excel format, so you can put in a number or part of a number and do the search, but if you don't know the number you need to hunt for, you have to do a search on every number put it in a database that tells you who owns the phone. If it's a pay as you go phone, you won't get an owner. One tower dump can give you thousands of numbers to check into. And it takes days if not weeks or months to get the carriers to give you the data once you get your subpoena.
Dear Skully,
The F.B.I. has state of the art technical apps to analyze the C.S.L.I. Once the data is analyzed and categorized through the app, then the investigative team goes through the information. That is when they begin to find leads to follow.
In addition to the C.S.L.I, it is quite likely that the F.B.I. have utilized a cell-site simulator (C.S.S.). Under the circumstances in this case, there is absolutely no need for a warrant to proceed with this.
As per the following excerpt from the "Department of Justice Policy Guidance: Use of Cell-Site Simulator Technology" (pdf)
1. Exigent Circumstances under the Fourth Amendment Exigent circumstances can vitiate a Fourth Amendment warrant requirement, but cell-site simulators s611 require court approval in order to be lawfully deployed. An exigency that excuses the need to obtain a warrant may arise when the needs of law enforcement are so compelling that they render a warrantless search objectively reasonable. When an officer has the requisite probable cause, a variety of types of exigent circumstances may justify dispensing with a warrant. These include the need to protect human life or avert serious injury; the prevention of the imminent destruction of evidence; the hot pursuit of a fleeing felon; or the prevention of escape by a suspect or convicted fugitive from justice.
https://oversight.house.gov/wp-cont...nce-Use-of-Cell-Site-Simulator-Technology.pdf