India, Aug. 13 -- Ethan Blaine Nieneker opened fire outside a Target store in Austin on Monday, killing three people. The victims have been identified as Hector Leopoldo Martinez Machuca, 24, a Target employee; Adam Chow, 65; and Chow's four-year-old granddaughter. Police alleged that the shooting suspect made the child watch her grandfather's murder before executing her.

Austin police alleged that Nieneker forced the girl to watch as he fatally shot her grandfather and wounded her grandmother. Officials further noted that the 32-year-old had a history of mental illness, without getting into specifics.

Police said Nieneker fled the store in a vehicle stolen from the parking lot - believed to belong to one of the victims, before crashing...