A Nevada man has been sentenced to decades in prison after embarking on a ruthless killing spree, targeting unsuspecting individuals in public spaces without any discernible motive other than a desire for violence.

Clark County Chief Deputy District Attorney Marc DiGiacomo remarked at Alonzo Brown’s sentencing that Brown had decided to become a serial killer. He shared these insights with local CBS affiliate KLAS.

At just 18 years old, Brown initiated a series of killings in Las Vegas, resulting in at least three deaths over a six-month period, which led to his arrest and subsequent charges in 2022. Last year, Brown accepted a plea deal, and this week, he was sentenced to a minimum of 56 years behind bars.

The chilling sequence of murders began in January 2022 when Brown fatally shot 24-year-old Dae-von Lane, an acquaintance, while Lane was walking along East Tropicana Avenue. In the following months, Brown’s violence extended to strangers. In May and June of 2022, he killed 62-year-old Paul Viana and 36-year-old Josue Chaparro-Montalvo in the same area.

Chaparro-Montalvo was returning home from a convenience store, and Viana was waiting at a bus stop when they were senselessly gunned down. Surveillance footage later revealed Brown methodically stalking his victims.

“These murders are very disturbing,” LVMPD Captain Dori Koren stated during a 2022 press conference, as reported by local Fox affiliate KVVU.

“What was especially disturbing as they reviewed some of the surveillance footage, they noticed that the suspect seemed to stalk the victim,” Koren said. “Appeared to be a random killing, there wasn’t any apparent motive from what we can tell.”

Describing Viana’s death at Brown’s sentencing, DiGiacomo said, “He literally stalks the victim as the victim was waiting for a bus — and then just walks up to a stranger and executes him.”

Brown claimed in interviews that he was “trying to figure out life” when the murders occurred and was not in a healthy mental state. “A normal, sane 18-year-old kid is not going to go ahead and wake up and go on a killing spree,” he told KLAS in 2022.

Brown, who was given credit for time served, won’t be eligible for parole until 2078.