Water came out of the shower head, but at such a rate that it would take hours to fill the shower. However, when stripping the DI, you forgot to remove his diamond ear-ring (Oh NO!). The DI then smashed the glass with ease using this 100% pure diamond. The woman was another thief who tried to steal the ring before the DI found and poisoned her with something from the bathroom (bleach or something). After realizing his crime, the DI then moved the body into the other room, stole the ring and ran away to start a new life in Cuba.
I have a thing about searching the internet for people in showers so I think I'll pass.
Also, could you state in blue that none of the DI's other body parts could have been removed and used to break the glass? I really don't want to write a blue truth that graphic so you'd be doing me a favour here.