Let fall

I was asked to help my friend Zeng to evaluate a tenant applicant yesterday. He was anxious to have him. I questioned about why he left his old address. He said he cared his mother till she died from cancer at 64. He sold the house and looked a place for his tattoo business. He bragged about how a artisan in that line can have clients of 5 years waiting list. How quick he can do it. How he loves cooking. It seems right for him, but as cautious as a young fox, :) I asked another question: Why don't you have a car? The answer is a "let fall": "I have epilepsy, by law I was not allowed to drive in case I fall in seizure".
After his happy reservation, I checked info on this disease, I read this news: An epilepsy patient is free from killing a nun after 2 years detention. I called my friend. He is much obliged about my carefulness