A tracking dog attacked a 16-year-old student and began barking furiously: when the police took the girl’s fingerprints, they uncovered something horrifying.

At High School No. 17 in the city, it was decided to hold an “open lesson” on safety. In the auditorium, senior students, teachers, and parents gathered. A police officer from the canine unit had been invited, along with his service dog—a German Shepherd named Ted.

The officer, in uniform, strode confidently onto the stage with Ted at his side. The dog appeared calm, almost a little lazy—walking slowly beside his handler, though his eyes scanned the room without pause. The students exchanged curious glances and whispered to one another.

“This isn’t just a dog,” the officer said with a smile. “He’s my partner. And he never makes a mistake.”

He gave a short demonstration: Ted found a fake weapon hidden in a backpack and even lay down beside a student who had a special marker in his pocket. The children applauded.

But then, everything changed.

Just as the officer was about to wrap up the presentation, Ted suddenly became alert. His ears shot up, the fur on his neck bristled. He froze, staring at the crowd of students. And then… he lunged forward with a growl.

“Ted! Stop!” the handler shouted, but the dog didn’t listen.

The German Shepherd charged, barking loudly, toward a girl sitting in the third row. She was a quiet, reserved student named May—usually she sat at the back of the class.

That day she had chosen to sit with her friends, clutching a notebook to her chest. At first glance, she seemed like a shy, ordinary teenager.

But Ted was completely fixated on her. He growled, bared his teeth, and leapt at her, knocking her to the ground. The girl screamed, her notebook flew into the air, and panic spread through the auditorium. Teachers rushed to pull the dog away.

“Pfou, Ted! Down!” the officer yelled, gripping the collar and barely managing to restrain the German Shepherd. Still, the dog would not take his eyes off May.

The officer was stunned.