I didn't answer. They hung up after the 3rd ring.

Called, muted call when picked up.   Called back person answered, line went silent, played recording on the other end about "Florida state troopers association call will be recorded..."

One of the many charity SCAM calls.  Read about these various "troopers association" scams here:
https://www.consumer.ftc.gov/articles/0085-fu ... nd-firefighters
https://nonprofitquarterly.org/2013/06/07/ame ... -telemarketers/
https://smartasset.com/insights/the-50-worst- ... m-being-scammed