Bi Barrister

Okay then. So I don't have a suspect yet but here's how it happened. The murderer shot Cassandra but it wasn't in some back storeroom. It was somewhere much more inconvenient. Like maybe a bathroom or something. Anyway the point is that they couldn't just drag the body through a public location. They needed something to hide it in. And that's where the dumpster comes in.

The murderer wheeled the dumpster off to the murder location, and there they slipped Cassandra's body inside, and then casually wheeled it back out to the alleyway. Only they didn't realize that they'd taken the dumpster during its collection period and consequently the good sanitation workers of the city had been unable to empty it.

It was a small mistake but it proves that it couldn't have been Barry as Barry's alibi for 4:30 is airtight.

P.s. we should definitely be looking through our manifest of justice for alternative suspects and a murder location even as we say this.