adj. 25B6; adjective
the guilty party : CULPABLE, to blame, at fault, in the wrong, blameworthy, responsible; erring, errant, delinquent, offending, sinful, criminal; archaic peccant.
I still feel guilty about it : ASHAMED, guilt-ridden, conscience-stricken, remorseful, sorry, contrite, repentant, penitent, regretful, rueful, abashed, shamefaced, sheepish, hangdog; in sackcloth and ashes.
innocent, unrepentant.