What Is This Neon Green Fly? Is it an unknown fly?

About two weeks ago, think, I was looking at a part of a creek in a certain city, and thought I was looking at a piece of algae with a mixture of bright and dark green colors, it stood out being thick-looking and on the side of the creek I never see such a thing so went to pick it up and was amazed to see a kind of fly I have never seen before (I am 43) and that doesn’t look much like any fly I can think of and that it had such a perfect-looking symmetry and skin, and looking very smooth. It looks like a little toy to me.

What type of fly is this?

Cryptid Bright Green Toy Fly – 1

Cryptid Bright Green Toy Fly – 2

Cryptid Bright Green Toy Fly – 3

Cryptid Bright Green Toy Fly – 4

Cryptid Bright Green Toy Fly – 5

Though I tried to preserve it, white police harassers harassing me as usual prevented and white local crazy people also harassing me, people who hate non-whites and those who “look homeless”, took up so much of my time and energy that tiny black ants it after I had put it in a certain jar repeatedly (it was dead after two days I think), where now only it’s wings remain. I was very sad about this. None of the photos were on HDR setting, it truly was as bright green as some of these cropped photos show. Some days earlier I saw another amazing unknown fly also as long as this one, it was black and moved like a wasp, it’s longish antennas too, and it had dull olive eyes which were smooth, large and beautiful. It flew off just as I was finally able to turn my phone’s camera on, and was not able to photograph or video record it.