A transgender teen who was allegedly planning a mass shooting on Valentine’s Day in Indiana had an “obsession” with Nikolas Cruz — the gunman who killed 17 people at his high school in Parkland, Florida, authorities say. Trinity Shockley, 18, who was charged with conspiracy to commit murder and two terrorism-related charges for her alleged plan to shoot up Mooresville High School, also had a collage of mass shooters on her bedroom wall, according to a shocking affidavit obtained by CNN affiliate WISH. In the affidavit, police detail the messages between Shockley and a person in an online chat room,...