The broad scientific consensus is that the deflation of the balls occurred naturally and there was no foul-play involved.

[0]http://www.si.com/nfl/2016/10/04/tom-brady-deflategate-ideal...

[1]http://www.wbur.org/onlyagame/2016/03/12/deflate-gate-scienc...

[2]https://www.sciencenews.org/blog/culture-beaker/deflategate-...

[3]https://www.youtube.com/watch?v=wwxXsEltyas

[4]http://www.breitbart.com/sports/2016/05/27/scientists-file-a...