Hello my brother in law work at the sherifs dept in Il and it is a scam what happenes is a in mate will see the number that your son dial's and then they will have someone call and say very mean things so that you will send money for your loved one, It also happened to us. you should call the local police dept and have them take a look at it.I hope this help's you but never give any info out or give them money. Remeber that if your son had a warent out for him they would be able to pull his file if in fact the call was real.Hope this helps you.