A forensic description of the scene depicts a classroom in Karlovo, Bulgaria

A forensic description of the scene depicts a classroom in Karlovo, Bulgaria. The room features pale yellow walls and a severely damaged concrete ceiling with large sections of missing plaster, revealing the underlying structure. A white security camera is mounted high on the left wall, and exposed electrical conduit runs horizontally. The floor appears to be a light-colored, possibly tiled or concrete surface with visible wear. Approximately 10-15 individuals, predominantly young adults or teenagers, are present. A person with blonde hair, presumably a teacher, stands at a large whiteboard at the front of the room, pointing with their right hand at mathematical equations and geometric figures drawn on the board. To the left of the whiteboard is a dark bulletin board displaying various papers. Students are seated at light-colored wooden desks with dark metal frames. In the mid-ground, two female students with long dark hair are seated facing the whiteboard. A blue plastic water bottle, identified as "Devin" brand, rests on the desk of the rightmost visible student. Another student's light brown handbag with a "GUESS" pattern is visible on a desk to the left. On the right side of the room, a female student wearing a white shirt with colorful stripes and glasses stands near the whiteboard, looking forward. Several other students, both male and female, are seated or partially visible throughout the room, some observing the whiteboard, others appearing less engaged. The student in the extreme foreground is partially visible, wearing dark brown trousers and white sneakers.