In a March 23, 2015, response to my public records request, the Delaware Division of State Police, noted that it does have a non-disclosure agreement with the FBI for cellular telephone monitoring and surveillance equipment.
The letter states,
Law Enforcement Sensitive: the information in the nondisclosure agreement is the property of the Federal Bureau of Investigation (FBI) and may be distributed within the Federal Government (and its contractors), U.S. intelligence, law enforcement, public safety of protection officials and individuals with a need to know. Distribution beyond these entities without FBI Operational Technology Division authorization is prohibited.
No information yet about when that agreement was signed or when the Delaware Division of State Police first acquired the equipment.