That should bother you even if you think that the preponderance of the evidence says that MacDonald is guilty.
A mystery that roasted Washington, D.C. for its sexual depravities might have been a guilty pleasure.
With one exception, these are people he admitted to hacking in 2006 by his guilty plea.
Old English gyltig, from gylt (see guilt (n.)). Of conscience, feelings, etc., 1590s. Meaning "person who is guilty" is from 1540s. To plead not guilty is from 15c.; to plead guilty is 19c., though, as OED notes, "Guilty is technically not a plea, but a confession."