My suspect: Black
Why: Because looks like a mischevious and powertful person, Could have caused a black eye, and his hat could have been made of metal and he could have stripped a piece of it off and put it around the sign to make it sharp and a better weapon.
Suspect: Ice
Why: Ice said to navy, "I'ma go to the bathroom brb bro." And Navy got worried so he went to look for Ice. In the mean time, Ice was at the bank locked in on purpose in the room, shouting help me! I'm stuck. Ruby comes in to help and he hides. Ruby walks in and he pushes and pins her to the ground. He was evesdropping on emerald earlier and heard him say is safe code. He unlocks it and takes the money, and suffocates ruby wit it. Thenhe leave because Ruby left the door open.
Who: Yellow
Why/how: Because yellow got bored after awhile at the church and with the dark mood of the atmosphere he decided to go scare some people at the cinema, because it was going to be dark there anyway. He got the owner to work with him on the prank. he turned everything off for 10 secondes. He put the soporific liquid on a tissue and dabbed it on Rainbow, Cotton Candy, and Ices faces. Then he ran away and left it there. The owner and him put a scary face on the screen they woke up and Cotton Candy got so scared and he got a heart attack.