Un Young Lee, 44, was sentenced to 9 years in state prison for the death of her mother-in-law last year. Firefighters received a call on March 25, 2015 about a blaze coming from the victim’s home in Diamond Bar. Later that day, Lee was found in Orange County driving her SUV, where the body of her 77-year-old mother-in-law, Young Ja Lee, was later found.