Man gets 24-year term for double homicide

Devin Lum is sentenced for killings in 2018

A 24-year-old South San Francisco man has been sentenced to two decades in prison for killing two people in a shooting outside a Broadmoor market in 2018, according to court records and authorities.

Devin Lum was sentenced in a Redwood City courtroom Monday, three months after he pleaded no contest to voluntary manslaughter in the deaths of 22-year-old Half Moon Bay resident Michael GarciaSalem and 21-year-old San Francisco resident Vanessa Guillory.

Lum shot Garcia-Salem and Guillory on Feb. 25, 2018 in the parking lot outside Hillside Market after a verbal argument that erupted between Lum, the man who drove him there, and other patrons including the victims.

According to investigators, moments later Garcia-Salem was walking toward the passenger side of a car where Lum was sitting when Lum pulled out a semi-automatic handgun and fired several shots. Garcia-Salem and Guillory, who was standing about 15 feet behind him, were hit multiple times. A third person was also shot.

Guillory died at the scene. Garcia-Salem was rushed to a local hospital, where he died from his injuries. The third victim, who was also shot multiple times, survived. The shooting was captured by the market’s surveillance system.

Lum and the man driving the car he was in, Dorian Duff-Guardado, fled the area but were arrested the next day in Oakland, where the latter lived. In July 2020, Duff-Guardado pleaded no contest to being an accessory to murder and was given a sevenyear prison term, which he is currently serving in a state prison facility in Susanville, according to state records.

When Lum was initially charged, he faced a potential death sentence, though that became increasingly unlikely in light of the state’s movement away from such punishment, capped by a 2019 moratorium ordered by Gov. Gavin Newsom.

Lum’s sentence is officially 24 years and 4 months in prison, with just over four years’ worth of credit for time served. He has also been ordered to pay over $15,000 in restitution to the victims’ families.

Additionally, the court has scheduled a Dec. 1 hearing for Lum in which it will assess, on the record, how his youth at the time of the shooting — he was 20 — could factor into his fitness for parole in the future. In the meantime, Lum is being held at the Maple Street Correctional Center in Redwood City, according to jail records.