In the sixth episode of the campaign, "Seeking Armoury", use the following combinations:
Explore + Police Work = Arrest, Case, Help, Interrogation
Explore + Case = Dock, Informant
Money + Informant = 22:00, Poker Club
Poker Club + 22:00 = 22:00, Charly
Charly + Arrest = Arrested Charly
Arrested Charly + Interrogation = 20:00, 20:30, 21:00, Frightened Charly, Interrogation
Dock + 20:00 = Red Minivan
Explore + Red Minivan
You may have to keep using the Dock + 20:00 combination until you earn the Red Minivan.
After this, the achievement should unlock.