The attack claimed the life of Austin Metcalf, 17, of Frisco. The victim’s father, said that his son was stabbed in the heart and died in his twin brother’s arms.

A shooting killed two brothers, one a 17-year-old Memorial High School student. December would deliver another tragedy: A 15-year-old freshman at the school died at home in what Frisco police called a possible double murder-suicide.

The meet was suspended Wednesday after Austin Metcalf, a 17-year-old athlete from Frisco Memorial High School, was fatally stabbed during an altercation.