Ads and cyber police call

My brother was working at a clinic as marketing manager. The owner of that clinic said he will give 10% of his profits if he improves his sales. But he didn't. He left the job but the stuff like laptop etc was with him. After discussion, after returned the stuff. But that doctor didn't give his 17 days of salary. So he messaged him some abusive stuff. Also he deleted his ads that he set up. All this happened on 20-22 of January. Now out of the blue, my brother got a call from cyber police saying come to the ps. He said he will come to the police station on Sunday. So, my question is what should be done in this: - 1. Avoid going to the police station and ignore the calls from police station. 2. Try to solve the matter over phone by bribing that person. 3. Talk with the doctor directly. 4. Go to the police station with an advocate. PS: MY MOTHER IS SICK. SHE HAS ANXIETY ISSUES. SO WE WANT THE MATTER TO SOLVE ASAP WITHOUT ANY BIG ISSUE. WE DON'T EVEN WANT TO TELL HER ABOUT ALL THIS.