counter fake ncr

My Sister was beaten up by her husband and In laws. I went late and understood heckling happened between wife and husband and my sisters who had gone to save their sister were implicated by brother in law. He mentioned my name too though I reached their when he had gone to police station. I was their to solve the differences and bring the couple close. While they agreed for mutual talk and resolving the issue on the argument took place on 28th July. Yesterday they have gone ncr done. What could the possible criminal thinking they are planning.