Vit take a backwards step. You're off on this one.
You know I agree with your general premise and YES, NBA games with Lines of 6 to 9 are the most commonly rigged games AFTER the SU outcome is no longer in doubt. But you can't call somethning Fixed when it's a 30+ foot shot at the end where a layup would have produ$ed the same outcome. If it was definitely rigged there would have been no foul vs Harden. I've seen 4 point games when the last 6 seconds were ticked off with no fouls. Maybe the crowd groaned because they didn't want Harden to get 50. Maybe they cheered the last Sixer hoop out of habit (they hit a long 3).
You can pretty much remove the refs and coaches from the fix-fraternity here. These players all know each other. You want to rig a game and the spread is 7 and the favorite leads by 7 with 20-30 seconds left it's a piece of cake.
If you want the Dog to cash have the Dog foul a poor FT shooter on each possession who will deliberately clang FT#1. After he goes 1for2 or 0for2 give the ball to the PG on the Dog and let him drive in for a layup (while the coach of the 'Winning' team yells, "No Fouls! No Fouls!" Shake hands and bro hug after the game lands 5-6.
If you want the favorite to cash foul their best FT shooter every time. Then after he converts pass it to a guy who never shoots 3s. After he airballs and the Favorite rebounds all you have to do here is not foul if the margin is 8+ and foul if it isn't. If it's 8+ at 30 seconds or less the favorite doesn't even need to shoot. Bring it over halfcourt and dribble the shotclock out. Then the Dog's PG can dribble out the final 3-5 seconds in the backcourt.
Crazy Shit I've seen:
About 10 years ago the Raptors were +2 vs the Sixers, down by 3 with 3 seconds left. After a Timeout the Raptors inbounded and drove for a dunk a 'lost' by 1 point!
About 3 years ago the Sixers were +8.5 at Milwaukee. They trailed by 8 with 20 seconds to go. 8 players stood around while Jrue Holiday chased Brandon Jennings until he caught him and ran him over with 14 seconds left. After Jennings made both FTs Jrue yelled for the ball. He raced across halfcourt, then stopped and dribbled out the last 10 seconds. Scumbag!
Nick Van Exel was once caught by a TNT mic telling a Blazer opponent "GLASS" before heaving his freethrow off the very top of the backboard. Portland rebounded and drove for the final basket, a layup that covered the +7 after they had trailed by 25 with 6 minutes left.