Chicago (CBS) — The Harvey police department has 71 full time officers on staff, but only three are on duty during a shift.

Ald. Christopher Clark, who is running for mayor, is asking the Cook County Sheriff for help because he is concerned the staffing situation prevents the police department from handling a recent spike in violence.

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Ezra Hill Jr. was in a car near 146th and Des Plaines with his dad Saturday afternoon. Another car drove up next to them and someone inside fired several times at the car. The 10-year-old boy was transported to Christ Hospital and later died.

Ten days before that, the 25-year-old son of a Harvey police officer was shot and killed at a Harvey nightclub.

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Three weeks ago, federal agents arrested two officers for obstruction of justice. Prosecutors say they falsified a police report to protect two acquaintances.

The charges came just hours after FBI agents raided the Harvey Police Department and city hall.

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The raid also led to extortion charges against two of the current mayor’s relatives and bribery charges against two others.