The suspect in custody for the Monday morning homicide of a 28-year-old Mission man lived with the victim in an apartment on the 1100 block of Valencia Street, said Maria Herrera, the victim’s grandmother, who also lives in the unit.

San Francisco police arrested 56-year-old Vincent Jacobo Monday afternoon for the homicide of Maurice White. Jacobo, a family friend of White and Herrera, was outside walking the dog when police nabbed him near the apartment, Herrera said.

While living together, White and Jacobo didn’t always get along, Herrera said. A few months ago, the two got into a fight, and White punched him. “I don’t know if he held it as a resentment,” Herrera said. “I don’t know.”

White grew up in the Mission District and attended Galileo Academy of Science & Technology, where he played football and baseball. In 2002, White was recognized as an all-city player for Galilieo’s Mighty Lions. Family members describe him as generous and well liked around the neighborhood.

“He helped a lot of people,” Herrera said. “Anyone who called, he’d be right there. He wouldn’t ask questions.”

Officers responded to reports of gunshots around 4:30 a.m. Monday, and found White near the corner of 21st and Bartlett streets — just three blocks from White’s apartment — suffering from at least one gunshot wound, according to police. Officers on the scene performed CPR, but White died in the street.

“He had a loving and caring heart,” said Daniela Flores, White’s cousin. “Very generous, outgoing person. The life of the party. He’s going to be missed greatly.”

On Monday morning, Herrera received a frantic call from a family member saying he’d heard Maurice was shot. Herrera called the police, and confirmed her grandson was dead.

That afternoon, Jacobo came back to the apartment acting “like nothing happened,” she said. Police arrested him that afternoon, and later returned around 5:00 p.m. to search the apartment.

“They were probably looking for weapons,” Herrera said.

No charges have been filed. Officers arrested Jacobo without incident, and police are still actively investigating the case, police spokesman Gordon Shyy said in a statement.

White had been shot once before about three to four years ago in a drive-by, Herrera said, adding that he took the bullet for a friend.

Flores saw White about two weeks ago, and he was “doing well,” she said. The two spoke for about an hour outside White’s apartment, updating each other on family matters. When she left, White gave Flores and her son a hug.

“I can’t even believe he’s gone,” she said. “It’s just so sad, because he was too young.”