Dortch, a 6-foot-1, 165-pound defensive back, also collected offers from Indiana, Iowa, and Iowa State, and was receiving significant interest from schools like Miami.
"He's really starting to blow up with spring football," Redhead said. "He got overshadowed a little bit by Dallas Crawford and Sammy Watkins. But now that he's my top senior - he has schools' attention.
"Miami was on the brink [of offering]. They just wanted to see him in camp against the rest of the guys and see how he did. They were pretty much in the same position as Carolina – if he came to camp [and] did well, he'd get an offer."
UNC began recruiting Dortch during the spring.
"Coach [Joe] Robinson came down, liked him, [and] passed it along to Coach [Troy] Douglas," Redhead said. "Coach Douglas liked him when he was at South Florida [and] talked to him for a while. And then Coach [Everett] Withers came down and watched a practice and checked him out, and really liked him. And they told him ‘Hey, come to camp, let us evaluate you, and if you do well you'll get an offer.'"
Dortch immediately accepted the invitation.
"Nate's a kid that likes to compete," Redhead said. "He came up and blew them away."
Dortch "blew them away" so much that the UNC coaching staff decided to offer him a scholarship before he left campus, which he accepted right away.
"They're getting a true cover corner," Redhead said. "[He's] a kid that all he did was run with Sammy Watkins all year long [last year] and Sammy was the No. 1 receiver in the state. So he can cover. You can put him on an island and forget about him.
"But he's also a physical tackler. He's 6-foot-1, 165 [pounds] and as he gets bigger and stronger, he's still going to keep his speed and agility.
"He's a good athlete. He's as good of a corner as I've ever coached."