The death of a man who was found beaten in a Southwest Baltimore alley in 2006 and died in May has been added to this year's homicide total, police said.

Each year, several people die from injuries suffered in previous years, and their deaths are added to the current year's homicide total so authorities aren't constantly changing previous year's statistics. There's typically a lag time between when the death occurs and when police are notified by the medical examiner's office. 

Joseph Curtis was found at about 2 a.m. on Sept. 18, 2006, lying in an alley and suffering from a wound to the head. Curtis, who was 61 at the time, was taken to Maryland Shock Trauma Center for treatment, and police would eventually arrest four people in connection with the attack.

Curtis died May 28, 2011 at age 65 from complications related to injuries he suffered in the attack, and police say the medical examiner notified them on Jan. 3 of his death. 

In 2006, police charged four men - Demario Henry, Marvin Henry, Triston Rice, and Denzell Robinson - in connection with the attack, and all four were convicted.

Demario Henry received 30 years, with all but 15 suspended, for attempted second-degree murder; Marvin Henry pleaded guilty and recieved 20 years for attempted second degree murder; Rice received 25 years for first-degree assault, and Robinson's case was remanded to juvenile court. 

Details of the case - such as the motive - were not immediately available.

Correction: This article initially gave an incorrect age for Curtis at the time of the attack. The Sun regrets the error.