The name Mario Leon appears in at least three unrelated Mario Leon criminal cases on the public record: a first-degree murder conviction in Tulare County, California; a New Mexico probation revocation involving a registered sex offender; and a federal guilty plea to illegal reentry in the Eastern District of Texas. The defendants are not the same person. Each case stands on its own facts.
Tulare County Murder Conviction
A Tulare County grand jury indicted Mario Leon on April 4, 2008, for murder under California Penal Code § 187(a). The indictment carried special-circumstance allegations of felony murder during a robbery and street gang murder, along with allegations of personal and intentional firearm use and street terrorism.
On October 9, 2009, a jury found Leon guilty of first-degree murder and found all special circumstances and firearm allegations true. On January 19, 2010, the court sentenced him to life in prison without the possibility of parole, plus 25 years to life for the firearm enhancement.1CaseMine. Leon v. Spearman, No. 1:14-cv-00301-DAD-SKO HC
Appeals
The California Court of Appeal affirmed the conviction and sentence on October 14, 2011, and the California Supreme Court declined review in February 2012. Leon then filed a federal habeas corpus petition in the United States District Court for the Eastern District of California, raising claims that included alleged constitutional violations, ineffective assistance of counsel, and insufficient evidence. On February 14, 2017, a magistrate judge recommended that the petition be dismissed.1CaseMine. Leon v. Spearman, No. 1:14-cv-00301-DAD-SKO HC
New Mexico Probation Revocation
A different defendant named Mario Leon was the subject of a New Mexico criminal case decided on appeal in 2012. Leon had a prior felony conviction for the attempted criminal sexual penetration of a seven-year-old child, which required him to register as a sex offender.2Court of Appeals of New Mexico. State v. Mario Leon, No. 31,067
He later pleaded no contest to one count of contributing to the delinquency of a minor and one count of selling or giving alcoholic beverages to a minor. On May 14, 2008, a district court sentenced him to three years of incarceration followed by one year of parole, partially suspended the sentence, and placed him on supervised probation.2Court of Appeals of New Mexico. State v. Mario Leon, No. 31,067
On December 11, 2009, the State petitioned to revoke his probation, citing alcohol in his home, failure to re-register as a sex offender, failure to attend counseling, and unauthorized contact with minors. The State also filed a supplemental information identifying him as a habitual offender based on the prior felony sex offense. The district court revoked probation and imposed a total of five years of incarceration followed by supervised probation.2Court of Appeals of New Mexico. State v. Mario Leon, No. 31,067
Leon appealed, challenging certain conditions tied to sex offender supervision as unlawful. On October 24, 2012, the New Mexico Court of Appeals affirmed, holding that the conditions were lawful and reasonably related to his rehabilitation and public safety given his criminal history.2Court of Appeals of New Mexico. State v. Mario Leon, No. 31,067
Federal Illegal Reentry Case in Texas
A separate federal matter in the Eastern District of Texas involved a defendant identified as Mario Arroyo-Leon, also known as Mario Leon Arroyo, charged with illegal reentry following removal under 8 U.S.C. § 1326. On January 6, 2022, United States District Judge Jeremy D. Kernodle accepted his guilty plea and adjudged him guilty.3GovInfo. United States v. Arroyo-Leon, No. 6:21-CR-0056-JDK