I think I saw child porn on my dad's phone.

Please let me know if you think there is another place I should be posting this. This was the first group that came to mind.My dad is one of the most amazing people I have ever known. He is kind, thoughtful, selfless, funny. Not without issues or demons. But aside for my husband and son, he is the most important person in my life.Tonight, after Thanksgiving dinner, he went to take a picture of me and my brother. His camera roll popped up, and I saw, very clearly, a little boy with his back towards the camera, naked from the waist down. Internally, I freaked out. Shortly after, my brother and I confronted him. I asked him about what I had seen. He said it was a meme with a little kid peeing on something Trump-related. He had already deleted it. He was not defensive or angry. He offered to show me all of the pictures in his phone. I said I believed him, in between sobbing. He then said "I'm fine." I thought this was weird.My dad watches my son all the time. He stays here with him at night. He has watched him for a weekend. My son absolutely adores my dad.A few years ago, a little girl next door to my parents kept talking about her vagina. Her mom asked her who had talked to her about these things and she said, "[my dad's name]". My dad had a lot of contact with not only this little girl, but her whole family. They had become like family to us, and were at my parents' frequently.Like I said at the beginning, I love my dad more than anything. Aside from these two instances, I have no reason to believe he would do anything to harm my son, or any other child. I know I was not abused as a child.Am I overreacting? Do I have reason to be concerned? Where do I go from here? via /r/Parenting https://ift.tt/2L4uVtp