WINNIPEG—American investigators believe the deaths of four people, including a baby and a teen, whose bodies were found in Manitoba near the United States border are linked to a larger human smuggling operation. The United States Attorney’s Office for the District of Minnesota said Steve Shand, 47, has been charged with human smuggling after seven Indian nationals were found in the U.S. and the discovery of the bodies. Court documents filed Wednesday in support of Shand’s arrest allege one of the people spent a significant amount of money to come to Canada with a fraudulent student visa. “The investigation into the death of the four individuals in Canada is ongoing along with an investigation into a larger human smuggling operation of which Shand is suspected of being a part,” John Stanley, a special agent with Homeland Security Investigations, said in court documents. According to the documents, a U.S. Border Patrol …