A man with a history of mental illness committed suicide and said it was my fault. Am I responsible?

There is no legal responsibility, but it is not necessarily in line with the law. A few days ago, the brave old man was harassed by the thief's family for many years. After mediation by the relevant departments, he finally lost money for the thief family. If the family has been bothering you since that person committed suicide, the police will only muddy the water and maintain stability. In the end, you can only lose money if you can't stand it.