Can I use text messages against someone in small claims court?

Question Details:

I was selling a car and the person gave me all but $100. They asked if they could drive the car to get the money and plates they had at home; they said that they would be back within 20 minutes. I was iffy but figured since I kept the title, the money that they did, and the other set of keys, that it would be fine. Well I have learned my lesson on being so kind-hearted. It has been a little over 2 weeks now and the person hit someone's car and now it is impounded on base due to them being military and getting in trouble on base. Can I use texts as proof against him in court? Important Notice