Inset left to right: Ramon Joseph Rivas and Jessica Marie Tinoco (Ventura County District Attorney's Office). Background: The residential street near where Rivas fatally stabbed Tinoco in Simi Valley, Calif. (Google Maps).
A California man will be spending significant time behind bars after viciously killing his girlfriend in front of her children.
In May, Ramon Joseph Rivas, 36, pleaded guilty to one count of murder in the second degree over the death of 34-year-old Jessica Marie Tinoco in September 2024, according to a press release issued by the Ventura County District Attorney's Office.
The guilty plea also contained admissions on several special conditions — effectively the Golden State version of sentencing enhancements — including use of a deadly weapon, the crime involving great violence, and the victim being particularly vulnerable.
On Friday, Rivas was sentenced to 51 years to life in prison.
"The defendant's willingness to take responsibility for his horrendous crime doesn't excuse what he did to the victim and her family," Senior Deputy District Attorney John Barrick said in a separate press release announcing the sentencing.
The fatal stabbing occurred at the couple's shared residence in Simi Valley — a large city roughly 35 miles northwest of Los Angeles.
On Sept. 27, 2024, police arrived at the residence to find Rivas exiting the house shirtless with blood on his upper torso.
The defendant was swiftly taken into custody as officers went inside to find Tinoco lying just inside the front door. The mother of five was suffering from multiple wounds to her face, abdomen, and arm.
Investigators soon found the discarded murder weapon on the living room floor — a bent steak knife covered in blood. There was also blood present throughout the residence.
The victim was rushed to Los Robles Hospital, where she was pronounced dead.
All five of Tinoco's children watched their mother being stabbed to death, according to the district attorney's office.
"Witnesses stated that during a domestic dispute, Rivas went into the kitchen, grabbed a knife, and began attacking Tinoco," the press release reads. "The children fled the residence. Tinoco was stabbed multiple times, including four wounds that were determined to be fatal."
The victim's family addressed the horror of the crime and the defendant himself during sentencing, according to a courtroom report by West Coast The CW flagship television station KTLA.
"Imagine seeing someone take your mom and there's nothing you can do about it," one of Tinoco's daughters said, recalling how she saw Rivas beating her mother and begging him to stop.
"I hope you realize you had a good family who loved you and know that you will not be able to experience that again," another of the victim's daughters said.
The defendant himself offered an apology during the hearing.
"I'm forever scarred by the split-second decision I made," Rivas said, directly addressing the victim's two children who were in court, according to the Ventura County Star. "I'm so, so sorry."
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