When Perry checks the crime scene car there's a dog in the lot and Perry is shown passing it a toy doused with the contents of a can labeled "poison". After receiving critiques on social media about the scene, Matthew Rhys said on his Twitter that the dog was not killed on screen; that chloroform in that time was labeled poison and that the dog was just drowsed. In fact bottles of chloroform still carry the "poison" label, this is because chloroform can cause serious, even fatal, side effects if large enough amounts are inhaled or ingested.