Swamped

"Actually, it says the prisoner is an expert on animals..."

Oh wait...doesn't...Shrike have a pen pal he talks about at times?

Wait...is Dean the animal expert? Jackson mentioned he was on pest control and now that you think about it, it does sound familiar.

Starling has a way with animals, almost as good as that of Rider. She's fascinated by swamp creatures which is part of the reason why she enjoys the cleaning duty. You know Rivers has had to put up with overhearing more than a few conversations between an excited Starling as she asks questions to Shrike about swamp creatures. More often than not though he doesn't have the answer and says "I'll have to ask my friend."

"Maybe Mantis is talking about Dean?" See how she reacts when hearing the prisoner's name. If it really is Shrike's friend Starling will definitely want to talk to him.

"You know i just came from interrogating one of them...I bet I could get us a meeting with him."

Rivers knows they can't just walk up and talk to a key prisoner without good reason, and you would need permission from an officer, so they wouldn't be permitted to visit...but if you can convince her that you could get Starling a few moments with Dean, she might acquiesce. Under some strict conditions: Dean is chained up good (no martial arts over here), Rivers waits outside the cell, and you finish helping shovel swamp animal poo.

As for actually letting Starling speak to Dean...that might be trickier...you'd need officer permission - Mudviper might help - but she's under suspicion...Doc, however was apparently speaking to Dean earlier...ugh...this conversation might be coming sooner than you thought.