I would not let this dog on leash even if you THINK he's 100% reliable. It should be a long, long time before he can earn back any off leash privileges -- given the mistake, challenge yourself to earn an off-leash OB title to prove he's as good as you want to believe by testing it in front of an OB judge before you trust your own instincts again on this one -- earning a CDX in AKC Open trials would give me a lot more confidence than "he's been good until now."
Here's why you don't have room to guess when he's "ready" after mistakes of this magnitude: getting this one wrong could result in your dog being taken and euthanized. I know pups that have done less harm than this and ended up impounded, held on rabies quarantine at the animal shelter, and then subject to "dangerous dog" hearings to decide whether to euthanize. Sometimes a "good" result in those hearings is the dog returned with a life-long order to be on a short leash and muzzled in public, and the owners must to carry a special canine liability insurance policy forever. Animal control periodically comes by and checks on containment and asks to see the policy document. One more incident will result in a dog like that being seized and euthanized, so there' no longer any room for that owner's mistakes. You don't want him to be on the radar of your local Animal Control -- and any jogger bit by him could file a report!
I'd ditch the long line on your walks through these places where you are running into people -- you don't have control with one. Put him on a normal 6' leash, in a prong collar with a back-up collar. When you see a jogger coming the opposite way, go off to the side, put him in a sit-stay, and let the jogger have the whole path to pass. If you hear one coming behind you, do the same thing. Since he'll be on leash, he'll be easy to correct -- I wouldn't let him stare or even follow the jogger with his eyes while he's holding his stay; the eyes should be on you.
It's "come to Jesus" time with dog training. I'd consider muzzling him in places where he might have enough freedom to chase and bite people -- so if you go for a long line, without control to stop him if someone gets close enough, then use a muzzle so a bad choice won't turn into a legal proceeding.
Last edited by Magwart; 04-11-2019 at 08:56 PM.