On Monday, authorities released surveillance video showing Crone, a bearded and muscular man. Crone, who was charged Monday night, is considered armed and dangerous, authorities said.
Loper, a Pine Hill resident, attended Highland High School and worked as a supervisor at a McDonald's and later at UPS before he went into the Marines, where he served four years, his father said Monday.
He had recently returned to South Jersey, where he was attending Rowan University part time at its Camden campus. Loper had also landed a job at Keystone Industries in Cherry Hill, a chemical company that manufactures fingernail polish and other items, his father said.
Monday morning at 9:17, Charles Barnes Jr., 31, was found dead in a grassy area near 33d Street and Farragut Avenue in East Camden.
Barnes, who had been living with a relative in Willingboro, died from a gunshot wound, authorities said.
The two deaths bring the city's homicide toll to 51. This time last year, the city had recorded 62 homicides in an unusually violent year that ended with 67, a record.
Authorities are asking anyone with information on Barnes' killing to call Anthony Roccia, an investigator with the Prosecutor's Office, at 856-974-3186 or Camden County Police Detective Rick Kunkel at 856-757-7420.
Those with information on Loper's death are asked to contact Detective John Hunsinger, an investigator with the Prosecutor's Office, at 609-548-1056, or Detective Lou Sanchez with the Camden County Police at 856-757-7420.