(Courtesy SFPD)

Man accused of kicking homeless man linked to fatal beating in Chinatown

A San Francisco man with a history of unprovoked attacks has been arrested in connection with the brutal killing of a 49-year-old homeless man found beaten to death in a Chinatown alley in April, police announced Friday.

Samuel Youmtoub, 59, was already being held at County Jail in connection with previous incidents when police arrested him on suspicion of murder on Nov. 30, police said. The District Attorney’s Office has not formally charged Youmtoub with murder.

Quang Troung was found the morning of April 15 with multiple head injuries near the yard entrance of the historic Cameron House community center at Joice and Clay streets. Neighbors at the time told the San Francisco Examiner he had been living in the alley in recent weeks and could often be heard yelling at night, leading them to think he might suffer from a mental health disorder.

SEE RELATED: Homeless man killed in Chinatown alleyway

Youmtoub was previously arrested in June for allegedly kicking a homeless person on May 24 who was laying down on the street twice in the face as he walked past him. The attack was captured on video.

SEE RELATED: SF man accused of kicking homeless person in face for no reason

He was also arrested for an unprovoked May 29 attack on a Muni bus that was also captured on video, during which Youmtoub allegedly broke the nose of a 28-year-old rider.

SEE RELATED: SF man who kicked sleeping person ‘mad’ about homeless crisis, prosecutors say

A spokeswoman for the Public Defender’s Office said Youmtoub is being held at Napa State Hospital and has been declared incompetent to stand trial on the previous charges against him.

(Courtesy SFPD Tenderloin Station via Twitter)

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