Hardship by police

One of my friend landed Rs. 8 lacs to someone. He gave some cheques to him and subsequently told to not present the same. While further he asked for money his phone got switched off. After two days he got call from police to come police station and told due to you he disappeared. Now police is calling him daily and keep him seating whole day there. Interestingly neither family members nor police r interested in finding him. While he switched off his phone he bought new phone and new Sim and called his wife that he is coming after sometime. Which is found from his call record. Some lawyer has advised to bounce his cheques immediately. My friend is extremely depressed and afraid, please help him soon.