The death of a 13-month-old boy last month is being investigated as a homicide, Baltimore police said today.

Davon Booth Jr. was taken to Good Samaritan Hospital on Aug. 8 after his father reported that he had found the boy unresponsive with vomit on his face, police said. The father said he had fed the baby and placed him in a bassinet, then walked into another room to cook dinner. When he saw the boy was not breathing, he called 911 and attempted CPR, police said. Davon was transported from the home, in the 5600 block of Woodmont Ave., to Good Samaritan and pronounced dead at 5:50 p.m. that day.

Police were told that since his birth, Davon had "bouts with vomiting after eating," and had been found unresponsive before, prompting 911 calls, said Detective Donny Moses, a police spokesman. But during an autopsy, a medical examiner determined there was blood in the boy's brain, indicating that he had been shaken or suffered other head injuries. Though there were no external signs of injury, the medical examiner's office determined his death was homicide by head trauma, police said. 

Moses said the case remains open and the medical examiner's office was conducting additional tests.