Found during a morning walk in a park in Denver

this is my 3rd time trying to post this, every time I do Reddit freezes and I have to restart… hopefully it works this time. Sorry if I’m just dumb and it’s a duplicate though!

I hope this is in the right thread but I found something today I don’t think I was supposed to see and want answers, so my roommates told me to post it on Reddit under a fake account. So hopefully someone can help!

But, I’ve been trying to quit smoking again and my favorite time to smoke is right when I wake up, so I’ve been trying to take some early morning walks. I decided to walk to a local park today that is very close to downtown Denver. As I was walking along the path I saw a Manila envelope laying on the ground next to a bench. I don’t know what possessed me to pick it up, probably either due to the fact I thought I may be able to return it to the owner or there might even be money in it. As you can see from the pictures, I didn’t find money or any direct info on the owner. I only found my mind racing with questions.

The envelope with the name Edmund written on the outside contained a hand written letter explaining that “K” and his sister supposedly found these photos from their dad and are looking for answers. Then there are 9 photos. 3 look like they contain a UFO the other 6 look like diagrams or something?

P.s. I already picked up the envelope before taking a picture of it on the ground. So I placed it back on the ground where I found it and took a picture then to show my roommates. So I had to recreate that. Just being as transparent as possible.