This game is really cool and makes you feel like a detective but also scared. The evidence was hard to find without the prompts something is here. I would try to guide the player to that location and make something visible with just the flashlight that would clue them into to look. Or use the blood that can be seen with the UV to guide them towards clues. The one door that is openable after 2 pieces of evidence had no prompt before you could open it like the last door did, and I didn't check it for a while after being able to open it due to this. Opening doors by finding evidence was a little strange. Maybe change it to we should check here next and we can leave after the evidence is collected or make the last piece of evidence a key to the basement door.
Really fun concept overall and I love how real everything looks! Great work!