This is probably the fake-debt-collector extortion scam explained by the FTC here http://www.ftc.gov/bcp/edu/pubs/consumer/alerts/alt076.shtm You do not get arrested for debt. Debt is handled in civil court and arrest is only for criminal court. Your caller is only trying to scare you into paying him extortion money.
I was called by this same phone number stating that my hubbie was going to be charged if we didn't pay a certain amount in full......well I did my own investigating and this info he was feeding me was not real...then he got mad at me and said , "I don't know why you are calling around, I already told you what u need to now......" he was doing me a favor and sticking his neck out for me.....lol. He supposedly was gonna make another trip to the courts to file the charges when I said I had to look into this since there are so many con artists out there nowadays.....he chuckled and said, "okay , you want to see a what a conartist I am, I'm gonna go press these charges and make sure u are also charged.....oh and if I were u I would walk lightly and try hard not to get pulled over....." now if that's not a threat, then I don't know what one is.