15 y . o . was shopping & trying on clothes w / a friend . She also changed from her school uniform to street clothes while in fitting rm . One of the shirts she was trying on accidentally got mixed in with her clothes she put back in her bag . The sensor went off , the guy by the exit asked to check her bag & discovered the shirt . She explained it must have gotten mixed in & gave it to him . He said : " this happens all the time , just need to tell my manager . " Manager came , instructed teen to come w / her . Took her to a locked room , questioned her , demanded social security # , DOB , address , and accused her of lying . Stated that she would arrest her & have her banned from shopping mall unless she confessed to stealing . Teen didn't . Teen is a respected honor student who has never convicted of anything .The girl never left the store. Her friend was asked to leave. The manager never identified herself or informed her of her intent. When the mother & I asked for information regarding who was involved & the loss prevention supervisor's name, the manager refused stating: "We do not give out personal information." I pointed out this was not personal, it was buisness. She stayed w/ her reply. Isn't it coercion if the manager was threatening to keep the girl locked up in this room, have her banned from the mall, etc. unless she admitted to stealing? If she really suspected her of stealing, wouldn't she call the police or at least mall security? The girl was held for at least 30 min. Is that one thing enough for Probable Cause?