Lance Buckley was located Friday in Frederick County at a family campground near Harpers Ferry, West Virginia.
"We are truly pleased that Mr. Buckley was found safe and in good condition," said Stafford County Sheriff Charles Jett. "The partnership between the law enforcement agencies, the Media and citizens in this region were critical to locating Lance Buckley."
FOX 5's Sarah Simmons spoke with Buckley's family outside Frederick Memorial Hospital where police brought Buckley after locating him.
"There's been such a united, concerted effort. It's just unbelievable," said Buckley's mother, Loretta.
"Did he say why?" asked Simmons.
"No, we have no information right now. There's just many questions. We are just so relieved to have Lance back to us," Loretta responded.
Lance Buckley is a husband and father of two, including a newborn. He is enrolled in a PhD program in microbiology at Howard University and was on his way to pick up his graduation packet Tuesday when he was last seen.
Earlier Friday, authorities released surveillance pictures of Buckley using an ATM at the school on Tuesday at 8:40 a.m.
Buckley's wife received a text from her husband at about 10:16 a.m. that morning, but that's when the family says the communication stopped. Buckley didn't show up for a meeting at noon Tuesday.
The Stafford County Sheriff's Office said tips led police to the campground where Buckley was found.