SACRAMENTO COUNTY (CBS13) — A man convicted of the murder and abuse of 22-month-old twins has been sentenced to 31 years to life in prison, the Sacramento County District Attorney’s Office said.

On May 3, Taylor Montgomery-Gutzman and Rebecca Thomas, the children’s mother, were found guilty of the strangulation death of one of the twins and the felony abuse of the other.

READ MORE: Person Suspected Of Shooting At Roseville Police Officer After Attempted Traffic Stop

RELATED: Woman Convicted In Death Of Her 22-Month-Old Child Sentenced To 21 years

READ MORE: Big Rig Ends Up Perched Precariously On Guardrail After Crash On I-5 In Woodland

Investigators said Thomas saw evidence of child abuse on her twins and was instructed to seek medical help for the injuries. Instead, prosecutors said she left her children with Taylor Montgomery-Gutzman, who strangled one of the twins in 2016.

MORE NEWS: Sacramento Mother Of 4 Killed After Stopping To Help Pedestrian Who Had Also Been Hit

Thomas was previously sentenced to 25 years to life in prison.