night of the long knives

[vsaki]

is rohm grumbling about hitler's evidence of plot?

[Andyvon]

Are you asking whether Ernst Rohm had any knowledge of a plot against him or the SA before he was arrested? Maybe he did, but the events of that night were planned by Hitler to destroy the SA which had become too powerful. He probably did have some inkling of what was afoot, although he might have underestimated Hitler.