At least the bad guy didn’t get away to hurt anyone else.

Police believe Miller, 64, was outside the residence when the gunman pulled a handgun and attempted to rob the older man, Chicago police said. But Miller, a licensed concealed carry permit holder, pulled his own handgun, said Officer Michelle Tannehill, a police spokeswoman.

Both men were found dead at the scene, along with firearms, Tannehill said.

Miller had been at the property to check the plumbing for his son, who owns the building, according to the son, Mark Miller Jr., 32.

Miller Jr., a trucker, was on the phone talking to his dad, rescheduling movie plans, as his father, who was “walking and talking at the same time,’’ was outside the property, locking up the basement door. Suddenly, Miller Jr. heard gunshots, then his father saying: “Mark, I’ve been shot.’’