DENPASAR, Indonesia—An American woman convicted of helping to kill her mother on the Indonesian tourist island of Bali and stuff the body into a suitcase was deported Tuesday to the United States. Heather Mack, 26, was released from prison on Friday after serving seven years and two months of a 10-year sentence. Her then-boyfriend, who was also convicted in the killing, was sentenced to 18 years and remains in prison. Immigration officials escorted her to Bali’s airport on Tuesday for a flight to Jakarta, where she later departed for Chicago. The badly beaten body of her mother, wealthy Chicago socialite Sheila von Wiese-Mack, was found in a suitcase inside the trunk of a taxi parked at the upscale St. Regis Bali Resort in August 2014. The killing generated national and international attention for years, in part because of photographs of the suitcase that appeared too small to hold an adult …