Jose Ruiz Murders Mercedes Losoya

Jose Ruiz Mercedes Losoya
Jose Ruiz Mercedes Losoya

Jose Ruiz is a killer from Texas who was convicted of the torture and murder of five year old Mercedes Losoya

According to court documents Jose Ruiz was involved in a relationship with Mercedes Losoya mother Katrina Mendoza and would abuse her five year old daughter Mercedes. Ruiz would torture the little girl including pushing thumb tacks into her feet. Mendoza family would notify authorities that the little girl was being abused but nothing was done

Jose Ruiz and Katrina Mendoza would bring five year old Mercedes Losoya to the hospital where the little girl would die from the extensive damage to her body that would relase toxic proteins

Jose Ruiz would be arrested, convicted and sentenced to life in prison without parole

Katrina Mendoza would also be arrested and charged however she would agree to testify against Jose Ruiz to escape serious charges

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Jose Ruiz Case

A Texas man will serve life in prison for abusing and killing his girlfriend’s 5-year-old daughter in 2022, according to multiple reports.

Mercedes Losoya died in February 2022 in San Antonio, Texas, after being taken to a local hospital by her mother and the woman’s then-boyfriend, KSAT and KENS 5 reported.

Following her death, her mother’s then-boyfriend Jose Ruiz was charged with injury to a child, assault bodily injury, and violation of a protective order, News 4 San Antonio reported.

On Monday, a jury in San Antonio sentenced Ruiz to life for the abuse and killing of Mercedes, KSAT, KENS 5 and News 4 San Antonio reported.

Katrina Mendoza, Mercedes’ mother and Ruiz’s ex-girlfriend, was also charged with injuring a child, but accepted a plea deal on condition that she testify against Ruiz, per KENS 5, KSAT and Texas Public Radio.

Mendoza’s own family had raised alarm about her abuse of Mercedes in the months leading up to the killing, Texas Public Radio reported.

In court, Mendoza detailed the abuse Ruiz inflicted on Mercedes, per the outlets.

“He would pull Mercedes’ hair and cover her mouth and nose. Use thumbtacks on her feet,” Mendoza said, according to KSAT, adding that he would abuse her with her own urine.

He also put dog feces on the child to humiliate her, she said, per Texas Public Radio, KSAT and KENS 5.

He used the guise of “discipline” to beat Mercedes with his bare hands or the buckle of a belt, witnesses testified, according to Texas Public Radio.

In court, medical examiners said Mercedes died from a condition that stems from toxin protein released into the blood from damaged muscle – a result of her physical abuse, per the outlet.

Dr. Rajesh Kannan, who conducted the autopsy on the child’s body, said in court that she had “extensive” trauma, according to Texas Public Radio.

“From top to bottom. All over the body,” Dr. Kannan testified, according to the outlet.

Ruiz was given life in prison on one count, 20 years in prison on another, and 10 years in prison on six other counts, per KSAT. Mendoza faces up to 45 years in prison as part of her plea deal, KENS 5 reported.

If you suspect child abuse, call the Childhelp National Child Abuse Hotline at 1-800-4-A-Child or 1-800-422-4453, or go to All calls are toll-free and confidential. The hotline is available 24/7 in more than 170 languages.

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