A San Dimas woman was sentenced today to nine years in state prison after pleading guilty to a charge in connection with the death of her mother-in-law last year, the Los Angeles County District Attorney's Office announced.

Un Young Lee, 44, entered her plea to one count each of elder abuse causing death and arson of inhabited dwelling. She was immediately sentenced by Los Angeles County Superior Court Judge Salvatore Sirna.

Deputy District Attorney Tony Cho of the Elder Abuse Section prosecuted the case.

On March 25, 2015, firefighters responded to a blaze at the victim's home in the 1200 block of North Diamond Bar Boulevard in Diamond Bar. No one was found inside.

Lee was found later that day driving her SUV in Orange County. The remains of her 77-year-old mother-in-law, Young Ja Lee, were found inside the vehicle. Prosecutors believe the elder Lee died sometime between March 23 and March 25.

Case KA109351 was investigated by the Los Angeles County Sheriff's Department.

Los Angeles County District Attorney / case KA109351 / October 11, 2016