The mother of a Hastings boy, shot to death last month by his brother, and her live-in boyfriend have been charged with negligent child abuse resulting in death.

The Adams County Attorney’s Office filed charges Thursday against 29-year-old Amanda Pecor and 30-year-old Matthew Edwards.

Authorities say police, school and mental health officials had concerns about the 9-year-old’s often violent behavior and that officials had warned both his mother and her boyfriend to lock up all knives, other sharp items and guns in the house for weeks before the young boy was shot.

The boy shot and killed his brother, 4-year-old Beau Pecor, on April 18.