Where i find the helmet big dad??

[Verde]

i run in all rooms and i take a print at where was supose to be
this ♥♥♥♥ is not there

so i really need reestart the stage?

[Yazite]

Head over to Candidate Induction, the eastern branch of this area. On the far side of the room are the big daddy helmets.

[Verde]

Thanks
but as you can see in my screenshot, is not there.

i restart the mission.
i finish the game.
im playing bioshock2