Djeswende Reid, 66, and Stephen Reid, 67, had been shot multiple times, according to Deputy Chief Medical Examiner Mitchell Weinberg.
They had left their apartment to go for a walk around 2:22 p.m. Monday, and their family and friends did not see or hear from them afterward, authorities said.
Concord Police are asking people to report suspicious behavior and share any surveillance video from the area.
“It just seems random. That’s the scariest part,” Ron Biavaschi told the station. “You have a freak on the loose, you know.”