Make a Pathfinding NPC take the long route

currently, i’m making a horror game where you run from a serial killer; but you aren’t able to hear audio directionally (only how loud it is, not where it’s coming from). this makes it tough to tell which way the killer is coming from, and i want him to lean into that by doing things like pausing, doubling back, and other stuff.

how am i able to make him randomly choose between taking the short (green) route or the long (yellow) one?

Not sure exactly how you can implement it but what you can do is that you can compute path once
And then in the middle of it put part (idk 10,1,10 size with PathfindingModifier then compute second path and put high cost to the label of this pathfinding modifier path PathfindingService | Documentation - Roblox Creator Hub
This probably will make computed path to be different

obstruct the shortest path with a collidable part that intervenes with it (for instance its like a person choosing an unlocked door over a locked door because the other door is locked)