Patrick Kelly O’Brien, 57, was fatally stabbed following an altercation behind a business on West Sahara Avenue in Las Vegas on February 4, 2017. Officers arrived just after 11:20 p.m. near South Valley View Boulevard to find O’Brien unresponsive; he was later pronounced dead at the scene. The Clark County coroner determined cause of death as multiple stab wounds and ruled the manner of death a homicide.

The Las Vegas Metropolitan Police Department opened an investigation, but initial reports did not identify a suspect and no arrests had been announced. The motive, what led to the fight, and the identity of the other person or persons involved were not clear in those reports.

If anyone has information about that night or about Patrick O’Brien’s movements that could help the investigation, please share what is known.