He said that his wife died, and the next day his wife sent me a text message on her mobile phone.

I have an idea. You can tell him seriously when your wife sent me a message on your mobile phone in the underworld (and then show it to him). Let him give his opinion. If he hid something from you before and saw that message, he must be very worried. If he is a good liar, he will make up an explanation for you. You can pretend to believe him. After a while, the liar can't remember what he said. Even if he remembers a general idea, he can't remember the details. You can find something tricky in the details. You should be a smart man! ! Trust your own judgment.