COLUMBIA, Maryland (Reuters) - A gunman who shot and killed two people at a Maryland mall was a 19-year-old who lived with his mother in a nearby Washington suburb and arrived at the shopping centre in a taxi about an hour before opening fire, police said on Sunday.
But a day after Saturday's shootings, police could provide no immediate insight into why Darion Marcus Aguilar killed a young man and a young woman at the mall in Columbia, Maryland, about 20 miles (32 km) west of Baltimore, before apparently killing himself.