text: A woman was caught on camera sobbing with blood on her face as she was being arrested for the stabbing death of her husband in San Diego Sunday. Sandra Mathis, 52, surrendered to police just after 4.45pm in the 1800 block of Commercial Street after police say she repeatedly plunged a knife into her husband's upper torso. The 48-year-old victim was discovered lying on the ground unresponsive with blood gushing from a wound in his neck. He was taken to UCSD Medical Center, where he was pronounced dead from his injuries two hours later. Scroll down for video . Bloody Sunday: Sandra Mathis, 52, was charged with murder after police say she stabbed her 48-year-old husband multiple times in the upper torso after an argument. The woman was caught on camera weeping with blood on her face during her arrest Sunday . In broad daylight: Mathis' 48-year-old husband was found bleeding from a wound in his neck under a bridge in the 1800 block of Commercial Street in San Diego Sunday afternoon . According to police, the victim and his wife were homeless and living in a makeshift tent camp under a bridge in the Barrio Logan section of San Diego. Police officers who responded to the scene found Sandra Mathis trying to revive her mortally wounded husband, but to no avail, according to the station CBS8. News cameras were rolling as the dishevelled, blood-spattered woman missing several teeth was placed in handcuffs. Mrs Mathis was charged with murder and taken to the Los Colinas Detention Facility. Responding officers seized a knife believed to be the murder weapon from the scene. First aid: Officers found Sandra Mathis trying to revive her mortally wounded husband . Strained marriage: Mathis and her husband were homeless and suffering from alcohol problems . Police said there was no history of domestic violence between the couple down-on-their-luck couple, but their friends said they both had a drinking problem. Investigators say the stabbing was sparked by an argument between the husband and wife. Carmen Chambers, who knew Mathis and her spouse, said they appeared to be devoted to one another, but their difficult circumstances may have put a strain on their relationship.
target: Sandra Mathis, 52, charged with murder for allegedly stabbing 48-year-old husband multiple times after argument .
  Mathis was caught on camera weeping with blood on her face as she was being handcuffed .
  Couple, who had problems with alcohol, lived in makeshift camp under a bridge in San Diego .