The calls don't lie.
Follow the money.

The pattern

Some nights have a balance sheet attached.

A Tuesday in November between two teams out of the playoff hunt has nothing to manage. A wildcard race in March, a Game 6 with a series clinch on the line, those have revenue on them. The same league office assigns the refs to all of them. The pressure to bend a result shows up where the money does.

Where to start

Four doors into the same building.

The money's on paper. The pattern's in the numbers. The cases are filed. The motive is clear.