How about the fact that the entire second half was drenched from a continuous downpour? It could be as simple as the idea that NE plays outdoors at home and the Colts do not. The entire second half play by the Colts looked a lot different than the first half - as if they had lost major momentum and basically, given up.
Very logical explanation, I admit. But it doesn’t dismiss the need for an investigation of the football charge.