FILE - People hold candles for the victims near the Vladislav Ribnikar school in Belgrade, Serbia, Wednesday, May 3, 2023. A teenage boy opened fire at the school on the morning of May 3, 2023. Eight children and a school guard died, and seven people were wounded. One of the wounded, a child, died from injuries later. A total of 10 people were killed. (AP Photo/Armin Durgut, File)
FILE - Police officers block the streets surrounding the Vladislav Ribnikar school in Belgrade, Serbia, Wednesday, May 3, 2023. A teenage boy opened fire at the school on the morning of May 3, 2023. Eight children and a school guard died, and seven people were wounded. One of the wounded, a child, died from injuries later. A total of 10 people were killed. (AP Photo/Darko Vojinovic, File)
In this photo taken on Saturday, April 27, 2024, framed photographs of Ana Bozovic, a slain elementary school student, are on display in her family living room in Belgrade, Serbia. The 11-year-old Ana Bozovic had just arrived to her school in central Belgrade last year when another pupil, 13 at the time, came in and opened fire at anyone standing in his way. A total of 10 people were killed. (AP Photo/Marko Drobnjakovic)
FILE - Police officers guard the Vladimir Ribnikar school in Belgrade, Serbia, Thursday, May 4, 2023. A teenage boy opened fire at the school on the morning of May 3, 2023. Eight children and a school guard died, and seven people were wounded. One of the wounded, a child, died from injuries later. A total of 10 people were killed. (AP Photo/Darko Vojinovic, File)
FILE - A woman hugs a girl near the Vladislav Ribnikar school in Belgrade, Serbia, Wednesday, May 3, 2023. A teenage boy opened fire at the school on the morning of May 3, 2023. Eight children and a school guard died, and seven people were wounded. One of the wounded, a child, died from injuries later. A total of 10 people were killed. (AP Photo/Armin Durgut, File)
In this photo taken on Saturday, April 27, 2024, a framed photograph of Ana Bozovic, a slain elementary school student, sits above her bed in Belgrade, Serbia. The 11-year-old Ana Bozovic had just arrived to her school in central Belgrade last year when another pupil, 13 at the time, came in and opened fire at anyone standing in his way. A total of 10 people were killed. (AP Photo/Marko Drobnjakovic)
FILE - People light candles for the victims near the Vladislav Ribnikar school in Belgrade, Serbia, Wednesday, May 3, 2023. A teenage boy opened fire at the school on the morning of May 3, 2023. Eight children and a school guard died, and seven people were wounded. One of the wounded, a child, died from injuries later. A total of 10 people were killed. (AP Photo/Darko Vojinovic)
FILE - Police block streets around the Vladislav Ribnikar school in Belgrade, Serbia, Wednesday, May 3, 2023. A teenage boy opened fire at the school on the morning of May 3, 2023. Eight children and a school guard died, and seven people were wounded. One of the wounded, a child, died from injuries later. A total of 10 people were killed. (AP Photo/Darko Vojinovic, File)
In this photo taken on Saturday, April 27, 2024, Ninela Radicevic, 49, the mother of Ana Bozovic, a slain elementary school student, sits in her living room in Belgrade, Serbia. The 11-year-old Ana Bozovic had just arrived to her school in central Belgrade last year when another pupil, 13 at the time, came in and opened fire at anyone standing in his way. A total of 10 people were killed. (AP Photo/Marko Drobnjakovic)
FILE - Flowers and toys are placed for the victims near the Vladislav Ribnikar school in Belgrade, Serbia, Thursday, May 4, 2023. A teenage boy opened fire at the school on the morning of May 3, 2023. Eight children and a school guard died, and seven people were wounded. One of the wounded, a child, died from injuries later. A total of 10 people were killed. (AP Photo/Darko Vojinovic, File)