There were several men,Hyde and Douglas,I bellieve,who testified about the placement of communist in seminaries before the House UnAmerican Activities Committee.
My interest started back in the 60's,when I was writing some papers for Sociology classes and chose guerrilla warfare for the topic. My husband had just been killed in Viet Nam and I was researching quite a few related things.
I came across much info aboutthe Church being infiltrated but I thought things were pretty fine in the Church and didn't really focus on it too much since it was not my focus at the time.
By the eighties,it was clear the Church was in trouble and now I am convinced the problems were attributable to an admixture of evils,comminist infiltration being just one facet.
Anyway,I hope this gives you some food for thought.