Just thinking out loud here...
but sounds like you asked the employee to look up someone, and he did.
While doing so, he found something that may be a threat to your company in someway and held off contact until he discussed his findings with you?
if that's the way I'm reading it, sounds to me like he's got your companies interest at heart.
I don't understand how people are saying he was trying to avoid work.. it's a phonecall
hardly backbreaking labor
If you want robots, that's one thing, but I'd want someone who thinks about what he's doing when doing it, and might question me if I'm about to make a business decision that would hurt the company.
right or wrong, nothing wrong with noting an objection.