A gunman opened fire Monday afternoon in the parking lot of a Target store on Research Boulevard in North Austin, killing two adults and a child and wounding at least one other person, according to Austin Police Chief Lisa Davis. Officers responding to 2:15 p.m. emergency calls found the victims outside the store, where shoppers had been busy with back-to-school purchases. The suspect, identified by police on Tuesday as 32-year-old Ethan Blaine Nieneker, fled the scene in a stolen vehicle believed to belong to one of the victims. He crashed that car nearby, carjacked a second vehicle from a Volkswagen dealership and led officers on an 18-mile pursuit through the city before they subdued him with a Taser and took him into custody in South Austin. Davis said Nieneker has a history of mental-health problems and prior arrests. Prosecutors are weighing capital-murder charges. Investigators have not disclosed a motive and have not released the names of the victims. Target Corp. said it is cooperating with authorities and will provide counseling to employees. Austin Mayor Kirk Watson called the attack a “cowardly act of gun violence.” The shooting is the latest high-profile incident in Texas to raise fresh questions about public safety as the state prepares for the start of the school year.