Just hear air..no one says anything

I have received a few calls from a man identifying himself as Michael and leaving very threatening calls. My daughter in law just called me and said he had called her. He says he is looking for my daughter and is very rude and leaves messages and when we called him back he threatens to send the police to our house and then tells us good luck and he will see us all in jail and court. Please help us to stop these calls. If he calls me again I am going to contact my son who lives in Florida and married to a police officer and have her find this guy. We do plan on filing charges of harrassment on him when located.

i received a call from this number but the voice call was too bad and i sent a message to it to know who calls me? no one reply

Called my cell Sunday 7:00pm

Hang up call.

they called laughed when I anwered then hanged up. when I called them back it is disconnected what is up with that these people. they need to take their service away.