Ask a Lawyer and Get Answers to Your Legal Questions
Generally the best place to look up information on a lawyer is on the state bar website. For the state of Connecticut the website is:
You would put in the lawyer's name and see what comes up. However, win loss records are not usually public. You can check those on his website if they post them or such sites as Yelp, Facebook, etc and checking out their reviews. The fact that he thinks he has a 70 % chance of winning, means he believes that the Jury on a 70% basis might find your son not guilty.
I hope this has answered all your questions. If you have further questions please do not hesitate to ask and I will respond as soon as I can. If your questions have been answered please accept this answer and provide positive feedback.