My son

Well what can I say, the reason I am writing this blog has everything to do with my son whom I might add is making my life a living Hell. He's going to be 18 in a little more then 2 weeks, and I have to say, I CAN'T WAIT!. I wish I knew why he can't seem to do right in life. He always finds trouble, and trouble is all around him. Today is a continuation from this past Saturday when He and his girlfriend took his girlfriends bestfriend and her little sister to Kohls. I got two stories so I am not sure which one is true, but the way I found out any of this was from calling the one girls mother looking for my son. When I asked if he was at her house she said NO, and he is no longer welcome here. I said, Oh great what did he do now. She proceeded to tell me that Matt and Holly took her daughter and her daughters little sister to Kohls to shoplift. UGH, my heart sunk. She said that My son and Holly took off and let the other kids get in trouble. When I finally did reach my son he told me that it was all a lie, and that the girls begged them to bring them shopping because they had 200 bucks and wanted to get the younger sister some new clothes. Whatever the true story is, I was told there is video from Kohls which shows my son in the store.
Now that brings me to today. My son was to go to a job interview out of the county (oh and he is on probation and not supposed to leave this county) anyway, I get a call from this same mother saying that my son and his girlfriend were at her house this morning throwing rocks at the windows of her house and threatening her daughter. She told me she had to call the police. I said do what you have to do. Anyway, I finally get a hold of my son and guess what???? His story is, "Thats a bunch of lies, I was never at that house, she made it all up" So then I get a call from the police who say the neighbors saw them doing it. So now it's just about 3:30pm, I'm sitting at work wishing I was not here, I don't know where my son is, I don't have any way to get in touch with him. he is in the car that is in MY NAME, and I pray he isn't doing anything bad. I am so upset, I just don't know what to do anymore. This story is long and goes back almost two or more years. But my son had just recently gotten out of a place called Northwestern Academy. He was sent there by the court for being bad. He was locked up there for 8 months, and I swear to you I really thought he had changed. I prayed he had changed. I did everything I could to show him how much I loved him and how I would support him in any possitive way if he choose to do good. He wanted to go to UTI this year to learn about working on cars, and of course I did everything I could to make this possible for him, I did all the paperwork for him filled out all the forms for Fasfa and did whatever it took to get him enrolled because this was something positive and something he loves so much. Anyway, looks like his behavior has changed for the worse and he will not be going to UTI anyway, now he doesn't want to go. Its all because of Holly. I am so angry and sad and disappointed in my son. My heart is aching so badly...and I just don't know what to do. Why do kids do these things?????