Can i get into trouble for a nude photo upload onto someones media account?

Okay.Here's what really happened. A student who is 17 years old left his iPad behind. Two others(17yrsolds) decided to do a prank. One was controlling the iPad. Who was also the one who looked up a nude photo from an online website and posted it onto the guys ipad. My only involvement that I got accused for, Was when the student looked up the photo he didn't know how to save it. I then showed him how to screenshot the photo. Then he continued doing everything else and I remained watching along with 3 other guys. Am I still at fault? Or could this still get me into a lot of trouble? I am 18.

Read more: Can i get into trouble for a nude photo upload onto someones media account?