My mom wants me to see a colombian therapist who falsely claims he's a Doctor?

many illegal aliens sometimes are doctors or dentist in their home countries. But because they are illegal they cannot practice here. I knew a Salvadoran guy who said he was a dentist in his home country. My mother wanted new dentures and he said he could do them. I was like "hell no mom!" but he made an offer my mother could refuse. He said he was going to charge her 80 for her denture and 20 for the exam. We went to his house and he was highly equipped. He did a x-ray and made a cast of her gum line and everything else. He said the teeth will be ready in about a week. We went back the following week for my amazement my mother love her dentures. My mother still has her dentures to this day. The clandestine dentist helped a lot people this way until somebody turn him in because that person dint want to pay him. He went to jail for helping people and not having a dentist license and later he was deported. I felt sad for him because he was the type of people that this country needs and he was very smart.