Shortly after 1 a.m., the suspect, a man in his 20s, approached and robbed the victim on Mission Street near Acton Street in the city’s Outer Mission neighborhood, San Francisco police Officer Albie Esparza said.
The suspect, who was not armed, then fled with the victim’s property, but a San Mateo County sheriff’s deputy who was part of a DUI saturation patrol nearby happened to making a U-turn in the same area of the robbery and was flagged down by the victim, Esparza said.
The victim gave the deputy a description of the suspect, and the deputy was able to track the man down.
The deputy detained the suspect at gunpoint for a short time in the area of Mission Street and Sickles Avenues until San Francisco police arrived and arrested him, Esparza said.
The suspect was taken into custody for the robbery at about 4 a.m. Sunday.