Did the police/Jason's friends and family ever do a thorough search of Fontenelle Park and Lake James Park? According to the page (
Jason Jolkowski | The Cubs Fan Who Didn’t Come Home | Ep 2) with details of Jason's case created by The Unfound Podcast (who interviewed Jason's mother), after passing the park Jason would have walked straight down Bedford Ave.
I know it sounds morbid but now might be the time to use search dogs or tools to identify human remains in the parks, since it sounded it was, still is and would be difficult if not impossible for police to get a search warrant for every house on Jason's route to his high school. I'm obviously suggesting this based on my own conclusion that Jason disappeared due to foul play and that he didn't disappear at his own will.
Otherwise, this case has been heartbreaking to learn about. He sounded like a sweet kid who was gone too soon. I hope he is found soon.