REPORTER: This morning, the owner of two of the most famous venues in New York is under scrutiny for using facial recognition technology to deny entry to certain people. New York Attorney General Letitia James has sent a letter to MSG Entertainment, owner of Madison Square Garden and Radio City Music Hall, requesting information about its use of the technology. - Your ticket is not valid. REPORTER: Multiple lawyers who are already involved in litigation against MSG say the company used facial recognition to bar them from events. Larry Hutcher says his Knicks season tickets were revoked last year after MSG removed his colleague from a game at Madison Square Garden. At the time, Hutcher's law firm represented ticket resellers who were suing MSG. - There is no rational, legal, moral, or any explanation that you could give that would justify the action that Madison Square Garden has taken. REPORTER: Kelly Conlin says she tried to attend a Rockettes show around the holidays. But she says the venue scanned her face and stopped her from entering. Her firm happened to be working a case against one of MSG's restaurants, James writing, "MSG Entertainment cannot fight their legal battles in their own arenas." A representative for MSG said the policy "does not unlawfully prohibit anyone from entering our venues. We are merely excluding a small percentage of lawyers only during active litigation." But the practice is raising ethical and legal questions with potential ripple effects far beyond New York. - It is very dystopian. It is very "1984"-ish. How far is this technology going to go that people are gonna be able to use this type of technology to take action that is clearly not what it was originally intended? It's frightening. - The attorney general is asking MSG to respond by February 13 and explain how it's complying with antidiscrimination laws.