The deadly incident happened around 7 a.m. Monday at the store on Central Avenue, according to the Riverside County Sheriff's Department.
The victim was identified as 65-year-old Jessica Morales, of Menifee. She was found with multiple stab wounds.
Investigators say the victim and suspect didn't have any interaction prior to the stabbing.
Walmart worker fatally stabbed at Lake Elsinore store, authorities say
A Walmart employee initially told Eyewitness News off camera that the suspect became upset when the employee didn't have a key to open a locked cabinet, however, investigators said the attack appeared to be random.
Authorities say the suspect, 29-year-old Lonnie Hinton from Wildomar, was on parole after being released from prison on March 23 of this year. He served a sentence for second-degree robbery and second-degree burglary.
In 2020, Hinton was arrested after being accused of stabbing an employee at a restaurant in Perris. That employee would survive, but charges for assault with a deadly weapon were dropped as part of a plea deal.
After Monday's attack, Hinton was arrested on suspicion of murder after he turned himself in at the Lake Elsinore Sheriff's Station, authorities said.
Walmart released a statement that said:
"We're heartbroken by what's happened at our Lake Elsinore store. The facility will remain closed as we work with police during their investigation. We offer our condolences and support to the family during this difficult time and will continue working with our associates, providing support as needed."