Mark Anthony Walls, known as Tony, was 48 when he left his home in the 200 block of Larissa Drive in Charleston, South Carolina, on the morning of August 22, 2018. He was last seen in person at about 6:45 a.m., leaving on foot without taking personal belongings during a difficult period in his life. Later that day, at 3:30 p.m., he appeared on a FaceTime call, seated against a tree outdoors and wearing a blue polo t-shirt; that call produced the last known visual of him.

Walls is described as a white male, brown hair, brown eyes, 5 feet 9 inches tall and about 200 pounds. He has several tattoos, including one on his chest, Madussella on his arm, and another on his forearm, plus a scar on his right wrist and a long scar on his abdomen. The Charleston Police Department opened an investigation and asked anyone with information to come forward.

The location seen during the FaceTime call was not identified, and no further contact was made after that afternoon, leaving family and friends with unanswered questions. If anyone saw Mark Walls on August 22, 2018, or has information about his whereabouts, please share what is known.