The first speaker is a lawyer. Then the second lawyer, a cop, says essentially "he's right. but you should trust our (cops') judgment, we are trying to help."
Right, you have to live with some level of trust. "Hey we are looking for a guy who kidnapped a child. Have you seen a white van in this lot today? It's really important we follow up on any possible leads so anything you can remember might help!"
"Sorry I won't speak to you without my lawyer present."