A teenager has been arrested in connection with the fatal shooting of two brothers during what Arlington police described as a high-risk transaction that went wrong. Xavier Weddington, 19, is facing a capital murder charge in the deaths of 17-year-old Jason Cuevas and 21-year-old Bryan Cuevas.

Officers went to the man's home, launched a drone and saw him leave wearing a ballistic vest and carrying an AR-15-style rifle.

"We are deeply saddened that this incident occurred at the conclusion of what should have been a joyful and memorable celebration," school officials said.