When Isaac is captured by Miami Metro, Dexter visits him in jail. That makes a record, since you have to show ID and sign in to visit a prisoner, and all uses of the visitor-intercom system used in jails are monitored and recorded. Bad for Dexter since he's not supposed to know Isaac and they discuss killings over the visitor phone. The writers of this show apparently have no idea how actual law enforcement works. In real life, someone like Hannah would never cooperate by showing police where victims are buried, but it's done here to advance the plot. Too bad the writers could not come up with a more realistic way to do it. There's speculation Hannah is interested in Dexter to make him a victim, but since everyone in Miami Metro knows what she did and sees her attraction to Dexter, they'd be pretty certain anything bad that happens to him will be her doing.
Review of Swim Deep
