His 22-year-old father, a Marine at the Miramar Marine Corps Air Station, was caring for the infant Wednesday when police received a 911 call that the boy had stopped breathing. Paramedics transported the child to a hospital, where he died Thursday morning.
San Diego Police detectives were called to the hospital because of the suspicious nature of the injuries.
The father, who has not been named, was questioned and released pending further investigation.
