Wow thats really bad, glad I did report now
It was actually 2 types of benifit fraud, income support and disability allowance even though he is not disabled or has no injury. I remember going to the hospital once and he used to pretend it hurt when they touched his back or when he tried walking! Well on this phone call they wanted his car registration number, his address, what he looks like so my guess is that they will secretly record him doing his stuff.