Aaron is vulnerable to this power. He pings as a regular human when it comes to mental abilities and fortitude. He has some pretty intense willpower, but he's nothing against a Psionic ability like this.

For him, he knows a lot about being a police officer, and a vampire. The most basic of this information would include laws, his job duties, and also what he needs to survive, what his limits and abilities are, and how to kill his specific breed of vampires.