(Seguin) -- A local man will spend the rest of his life behind bars for the March 2015 murder of his girlfriend.
After days of testimony, 32-year old Michael Lewis Arce was found guilty last night for the murder of 30 year old Vivian Cases. Arce originally was declared unfit to stand trial and spent months in a maximum mental health security unit.
A competency hearing was held a few months after the murder in front of 25th Judicial District Judge William D. Old III. Old is the same state district judge who handed down the life sentence around 9 p.m. Monday at the Guadalupe County Justice Center.
According to the Seguin Police Department, Arce is believed to have killed Cases by hitting her in the head with a rock or other unknown object "while attempting to sexually assault her."
After days of being reported missing, the woman's body was found in a shallow grave on property near the railroad tracks located near Sunset Street. The woman's family reported her missing after noting a physical disturbance by the couple of a few days earlier at a home located in the 700 block of Braden Street.