The 30-year-old victim was taken to a hospital after the incident occurred in a carport of an alley in the 1100 block of Thomas Avenue on March 16.
“The case is still under investigation,” said Deputy District Attorney Laura Evans on Thursday, noting she could not go into further details now.
Anthony Rossie Valenzuela pleaded not guilty when he was arraigned before a San Diego Superior Court judge. He is charged with causing great bodily injury to the victim, which is an enhancement that could add three years to a nine-year prison sentence if Valenzuela is convicted of attempted murder.
A preliminary hearing was set for April 4, but it may be delayed. Valenzuela remains in the central jail.
San Diego Police said the victim met two men on the trolley in Old Town and the three of them later went into an alley at Thomas Avenue and Dawes Street. One man remained with the victim in a carport around 3:30 p.m.
Police responded to a report of a fight at Thomas Avenue and Mission Boulevard and arrested Valenzuela.