Police said the deadly shooting happened around 5 a.m. at the AAF Flanders plant in Smithfield.
The students were last seen alive on April 16, and a mutual friend reported them missing the following day after being unable to reach them both, authorities said.
Law enforcement authorities in Florida say they have found the body of one of the two missing University of South Florida doctoral students on a bridge over Tampa Bay, and a roommate has been taken into custody.
Raleigh police say Ryan Greathouse is accused of assaulting his ex‑girlfriend and her boyfriend at a Raleigh home on April 12.
Franklin Faircloth, 29, was in court on Thursday and could face a murder charge if the victim does not survive.
Captain Adam Bean was found shot to death at a home in Hope Mills on Friday, March 27.