What sounds like a brutal crime thriller script is, according to police, exactly what unfolded inside a Las Vegas home: a man shot in the head, forced to swallow a large rock of fentanyl, then rushed into emergency surgery and placed on life support.
Las Vegas police say 36-year-old Oliver Marshall is at the center of that attack, accused of shooting 39-year-old Von Cummins in the head and using fentanyl in what investigators believe was an intentional attempt to kill him. Cummins survived emergency surgery and remains on life support, and authorities say Marshall and a 23-year-old woman now face a stack of felony charges.
According to the Las Vegas Review-Journal, the attack took place inside a home near East Pebble Road and Pollock Drive. Investigators allege Marshall ordered an unidentified man to “roll a fat foil” - described as a large dose of fentanyl - and then forced the rock into Cummins’ mouth before shooting him in the head.
The Las Vegas Review-Journal reports that Cummins’ girlfriend secretly dialed 911 during the assault and later told detectives Marshall suspected Cummins of stealing from his grandmother and trying to steal his girlfriend. Officers say Marshall bolted from the house and was ultimately arrested while riding in the back of an Uber.
Fentanyl’s Danger In Clark County
The Centers for Disease Control and Prevention notes that fentanyl is roughly 50 to 100 times more potent than morphine, which means even a small amount can be lethal. Local health officials say illicit fentanyl has driven a sharp rise in overdose deaths in Clark County, with the Southern Nevada Health District tracking hundreds of fentanyl-involved fatalities in recent years and expanding both naloxone distribution and testing-strip programs in response.
That extreme potency helps explain why, according to investigators, the suspects are believed to have tried to use the drug deliberately as a killing method rather than as a threat or a scare tactic.
Charges And Court Date
Police have charged Marshall with attempted murder, assault, robbery, burglary, kidnapping and conspiracy. Authorities say the same counts have been filed against the 23-year-old woman, identified as Johana Garcia Valenzuela.
The Las Vegas Review-Journal reports that Marshall is an admitted Bloods gang member and that court and Nevada Department of Corrections records show he previously served prison time for burglary, robbery, grand larceny and possession of a stolen vehicle. A preliminary hearing in the current case is scheduled for April 23, 2026, according to the paper.
Legal Implications
Nevada law specifically targets the kind of conduct alleged in this case. Under NRS 200.408, administering a controlled substance to assist in the commission of a violent crime is a category B felony, punishable by a prison term ranging from 1 to 20 years.
A related statute, NRS 200.405, criminalizes administering drugs to facilitate the commission of a felony more broadly and also carries significant penalties. If prosecutors win convictions on the full slate of charges, Marshall and Garcia Valenzuela could be looking at potential sentences that stretch over decades, depending on how the counts are proven and structured at sentencing.
Detectives say the investigation remains active as the case moves toward the April hearing. This story will be updated as prosecutors file additional documents or officials release further details.
