In season four episode "Sorry I Missed You", Sanchez explains the source of his constant anger problems: several years before he was married and his wife had a seizure disorder. She was told it was safe to go off her medications and later she is able to become pregnant. Five months pregnant with their first child, a baby girl, his wife had a seizure while driving and crashed her car, dying four days later. Sanchez blames the doctors and can't get over his anger at the unfairness of it all—though since his return from his suspension he seems to have his anger in better check. In "Hindsight, Part 4", Julio visits Maria's doctor to learn why he took Maria off of her seizure medicine. To Julio's shock, he learns the doctor didn't take her off of her medicine, Maria took herself off of it. The doctor had advised against Maria doing so and even had her sign a form he shows Julio that proves his story. Julio is left upset by the news and the fact that Maria had lied to him about it.