Ian is a Sniff, a psychic bloodhound. Give him an item, he can follow a person to the ends of the earth, give him a wall or a table, he can see what that wall has seen and it's all with a touch of his hand.
He used to work for Division, he was even trained by them but they went too far when they killed his mother. Now he uses his inside knowledge and Sniper training to hunt down agents. He won't stop until they're all dead and Division is destroyed.
[Disclaimer: Ian is an OC from the movie Push. Sniffs and Push belong to Summit Entertainment. Karl Urban belongs to himself. No copyright infringement intended. Don't sue, I'm broke. Muse and Mun way over 18 at this point. Damn it.]