Animation hidden key frame


#1

Hello i have some problem with animation in Maya.
I have key frame which are not visible.

In my model, the arm of my character is moving (keyframe70-71) I would like to delete the keyframe but i don’t find it. Do you know how i can find hidden keyframe

I’m looking in outliner and dope sheet but i didn’t find

Is there a way to avoid that kind of problem?

My file is here:
https://www.dropbox.com/s/pljpqgjbwplecks/foot.ma?dl=0

Thanks you very much for your help

Rémi