Jurnee Thompson, 8, was waiting with family outside a restaurant in St. Louis late last week when she was shot to death.

She is among at least a dozen children who have been killed by gunfire in the city since April, according to The Associated Press. And now, the authorities, who have struggled to charge the killers, have announced $25,000 rewards for information leading to arrests in four recent cases, including hers.

“If you are as outraged as I am when I say: ‘Who does this? Who shoots in the direction of a 3-year-old? Who shoots in the direction of a 7-year-old or an 8-year-old or a 10-year-old?’ then please help police to solve these crimes,” Mayor Lyda Krewson said at a news conference on Saturday.