A woman drowned her dog in a Florida airport bathroom and then boarded her international flight after she was prevented from bringing the white miniature schnauzer with her because of a paperwork issue, authorities said. The investigation into the death of the 9-year-old schnauzer named Tywinn started in December when a janitor found the dog in a trash bag in a bathroom stall at Orlando International Airport. The janitor earlier had seen the woman in the stall cleaning up water and dog food from the stall's floor.