Both hanged and hung are acceptable past tense of hang which differs in use. Hanged refers to an object, He hanged his coat at the window pane. Hung in the other hand refers to a person, The criminal was hung last week.
(def. 3): past tense and past participle hanged
a. To execute by suspending by the neck: They hanged the prisoner at dawn.
b. Used to express exasperation or disgust: I'll be hanged! Hang it all!
Example (judge to convict):
"You are sentenced to be hanged until dead."
USAGE NOTE Hanged
, as a past tense and a past participle of hang
, is used in the sense of “to put to death by hanging,” as in Frontier courts hanged many a prisoner after a summary trial
. A majority of the Usage Panel objects to hung
used in this sense. In all other senses of the word, hung
is the preferred form as past tense and past participle, as in I hung my child's picture above my desk.