During the afternoon he rang to the police.
The police immediately put trace on his calls.
Someone threantened to kill her, and said the most blood-curdling and hair-raising things.
The babysitter went upstairs and and found the boys that were on the other phone laughing.
The police telephoned her to tell that the other phone caller is upstairs.
The police managed to trace his call.
The caller rang again and the police kept him talking to the phone.