METAIRIE, La. -- An armed robbery investigation turned into a homicide investigation in Metairie today after the victim died due to his injuries nearly a week after the attack.

Police are searching for a suspect accused of robbing and now beating a man to death. According to the Jefferson Parish Sheriff's Office, 23-year-old Lorenzo Zamora beat a man unconscious before robbing him on Oct. 16 in the 6200 block of Riverside Drive.

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A witness told police that they saw Zamora walking with 52-year-old David Mayes when, without provocation, Zamora punched Mayes several times, knocking him out. According to police, Zamora then walked away, but returned soon after with a black male identified by police as 39-year-old Christopher Powell.

Powell and Zamora then robbed Mayes while he was unconscious before leaving again, according to police.

Zamora then returned a second time and repeatedly kicked Mayes while he was down according to JPSO. Mayes would later be taken to University Hospital by EMS where he underwent surgery, but ultimately died on Oct. 22.

JPSO Homicide investigators identified and arrested Christopher Powell and booked him with armed robbery.

Lorenzo Zamora, wanted for Second Degree Murder and Armed Robbery, is still at-large.

Anyone with information on Zamora's location is asked to call JPSO's homicide division at 504-364-5300 or CRIMESTOPPERS at 504-822-1111.