Kenneth McNally Jr. has been ordered to spend the rest of his life behind bars. Yesterday, a judge sentenced the El Cajon man to 216 years to life in state prison after a jury found him guilty of the 2023 killing of 59-year-old Samuel Holthaus on a rural Harbison Canyon property. Jurors heard a mix of eyewitness accounts and physical evidence that prosecutors said tied McNally to a brutal attack and the attempt to hide Holthaus' body.
Prosecutors' account and verdict
Prosecutors told the court that jurors convicted McNally of first-degree murder along with several other violent felonies. According to FOX5 San Diego, the jury also found him guilty of assault with a semi-automatic firearm, shooting at an inhabited structure or vehicle, and assault by means likely to produce great bodily injury. The San Diego County District Attorney's Office pushed for the harshest possible outcome, and the judge responded with consecutive terms totaling 216 years to life.
Scene, arrest and physical evidence
Deputies say Holthaus' body was found on September 3, 2023, in a shallow grave on roughly six acres in unincorporated El Cajon, with the top of his head still visible above the dirt, according to the San Diego County Sheriff's Department. Investigators reported that Holthaus' truck was parked near the grave, its driver's side door smeared with blood, with drag marks leading away from the vehicle. A bag of bloody clothing was later seized, and DNA tests showed the blood was mostly Holthaus'.
In the days after the discovery, investigators tracked McNally to a motel in El Cajon, where he was arrested without incident. 10News reported at the time that deputies identified him as the suspect in Holthaus' killing.
Witnesses and other specifics
At trial, jurors heard testimony that McNally admitted to killing Holthaus and that witnesses saw him driving Holthaus' truck erratically before parking it near the burial site. According to FOX5 San Diego, investigators said an extension cord had been wrapped around Holthaus' neck and that he suffered a gunshot wound to the face. Prosecutors also pointed to an empty gun case they say was found inside the trailer where McNally had been staying. The alleged murder weapon itself was never recovered, prosecutors told jurors.
Criminal history and what the sentence means
Prosecutors described McNally in court as a third-strike offender with a long record of violent offenses and said he was on probation at the time of the killing after a prior conviction for attacking a dog with an axe. The judge stacked both indeterminate and determinate terms, totaling 216 years to life, a number that, under current California rules, leaves McNally with no realistic chance of ever getting out. It is among the toughest outcomes available under state law when multiple violent felonies and sentence enhancements are in play.
How Three Strikes and stacked counts lead to long terms
California's Three Strikes law and related sentencing rules allow courts to hand down indeterminate life sentences for certain serious or violent felonies, then tack on additional fixed terms for separate counts and enhancements. When those pieces are ordered to run one after another, the math quickly climbs into triple digits. For a more detailed explanation of how the framework works, see the U.S. Department of Justice. Legal analysts note that in cases with multiple violent charges and prior strikes, the resulting punishment often functions as a de facto life sentence.
Earlier reporting and next steps
Hoodline previously reported on the original Harbison Canyon homicide in 2023; see our earlier Harbison Canyon homicide story for that coverage. McNally still has the option to appeal and to pursue post-trial motions, and records of his convictions and sentence will remain part of the public court file going forward.
