The Wilson County Humane Society says they believe the instances are connected.
Michael Zachariah Johnson, 18, is accused of violently attacking multiple nurses, EMTs and public safety officers at WakeMed.
More than half the school participated in the walk-out and nearly all seniors took part.
Wake County is the largest with more than 160,000 students.
He’s being held under a $200,000 bond.
The eight men arrested were part of the “Sex Money Murder” Blood gang, authorities said.
The tactical training was canceled due to feedback from residents and “in light of recent events.”
One dog was a Pitbull mix and died from blunt force trauma.
The march began at Pullen Memorial Baptist Church.
Jorge Salas-Ramos, 34, was shot around 7:15 p.m. Friday, police said.