A Northern California man has been arrested after he allegedly stole his roommate’s $10 million winning lottery ticket and replaced it with an altered losing ticket while the winner slept. Police detained Adul Saosongyang on Monday at a California Lottery office in Sacramento where he went to try and collect the cash, the Los Angeles Times reports. The winning ticket was bought on Dec. 20 in Vacaville—but when the real winner went to collect the winnings the next day, he was told he had a losing ticket that appeared to have been changed to look like the winning ticket. The winner suspected one of his roommates had switched tickets while he slept and he called in police. The following day, Saosongyang arrived at the lottery office with the real ticket. Lottery officials investigated, concluded that the ticket was stolen, and arranged for Saosongyang’s arrest. He remains in jail.