(hey... I'm gonna post a few then I must go, and I'll be back later on my break around 2-3pm most likely.)
Rika stands there, looking around at the others. "So... yeah let's just start by listing some evidence and such so we have a platform to start on.
The body had a huge dent in the back of the head, which resulted in only one blow and I can somewhat explain that in a second.
The murder weapon was a light dumbbell that was missing from a rack in the gym. It was found wrapped up in a trenchcoat found in a cabinet.
A blood smear trail led the way towards such cabinet, which makes me feel as if the killer had dropped their weapon on the ground initially.
I believe that the victim was actually wearing the trench coat during their murder. The back of the trench coat has just a singular blood splatter, which makes me reason that there was only one hit necessary to kill the victim. The killer then took off the victim's trench coat, wrapping the dumbbell on the inside of the coat and placing it in the cabinet for us to find.
The thing is, how did that blood smear trail happen? Did they just drag the coat? The body?"