My 22 year old DP has recently woken up to the fact that his father is abusive and has not returned to his family home since monday. Now they have text me saying that they will report him as a missing person to the police. (with an implication that i or he could be arrested for something, maybe kidnap?) Would the police do anything as they do know where he is, just that he will not respond to them. Who would be in trouble if the police decide that this is a waste of police time?