C.O.P.S. file: 392027.
When Longarm is chasing the crooks who have kidnapped his father and son, he drives back the "Roach Mall" billboard which was instrumental in the previous case involving Mickey O'Malley, C.O.P.S. file: 27423 (The Case of the Big Frame Up (1988)). The billboard remains unfinished and the painter's scaffolding is still attached.
This episode starts with a flashback set in 1985. The rest of the story takes place in 2020.