I feel Ur pain Brendan, and I'm sure most people here feel the same too.
Things like this shouldnt happen, but unfortunately they do..
Trust in Karma....a lot of bad karma will going this scumbags way. He'll get whats coming to him...eventually.
BTW: just a thought, can Ur phone company track the number he used to dial you from. since you know the time of call, they may be able to track the CLI ( caller line identification), and hand that info to the police to act on.
Sorry that bad things happened to you, and hope that things get better soon