NOTE: DC comics has had many characters that went by the name "Manhunter". The first costumed Manhunter from DC originally appeared in Adventure Comics #73 (April 1942), but a month before that, rival publisher Quality Comics premiered their own Manhunter.
From Police Comics #8 (March 1942):
To be continued . . .
And from the pages of Who's Who: The Definitive Directory of the DC Universe Vol. XIV (April 1986):