Which theory do you believe? Inside the police files of a missing child's cold case

Sophie Grégoire Trudeau stunned judges and an unsuspecting audience after she revealed herself to be the voice behind one of the characters on the Canadian French-language singing show, the Masked Singer. Grégoire Trudeau appeared on a Christmas special of the show, called Chanteurs Masqués in French, which she said in a post on Instagram was recorded over the summer. The show’s premise is for panelists and the audience to learn the identity of the celebrity singers, who compete to stay on the show until they are the last one left. Panelists on the Christmas special were unable to...