Officials confirmed on Monday that Jalen Carr of Sicklerville was taken into custody on Friday.
Carr has been charged with robbing 20-year-old Curtis Jenkins III at gunpoint. According to court documents, Carr demanded Jenkins' wallet and cell phone.
Last week, 32-year-old Brandon Beverly of Westville was charged with the kidnapping and murder of Jenkins.
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Court documents say Carr conspired with Beverly in the robbery.
Police say the younger Jenkins' body was found in an alley near his Camden home.