They are using police radios

“A police investigation of the towing industry last year revealed an elaborate scheme where criminal organizations used encrypted police radios to learn about collisions before their competitors. Joseph allegedly provided one of the radios to the groups and owned two trucks used by members of the organizations.”

https://www.insurancebusinessmag.com/ca/news/breaking-news/constable-allegedly-involved-in-insurance-scam-246476.aspx