You are exhibiting your ignorance. The term “Evidence” is singular and the verb has to agree with the subject not the object.
Your sentence should say:
The evidence against manning IS his own words.
Kapish? go back to school.
Whatever grammer nazi..
Evidence is an “uncountable noun”....there is no such word as “evidences”
And I aint the one defending a traitor.
(yes I used the word aint)