Hi, More than 4 years ago, one of my friends has overstayed his B1/B2 visa for 4 months. Now, he wants to get a new visa to get across the border. When I helped him check the I-94 history, I found there is no departure history for him. And here comes the question: Does that mean the CBP don't know he's overstayed? If so, given it's so easy to get denied for the new visa if you had a bad history, what if he lies about the overstay and pretend nothing's happened before in both of the DS-160 and the interview ?