(STMW) — Two city workers helped police apprehend a man who attempted to abduct a boy who was walking to his south suburban school Thursday morning.

About 8:15 a.m., Sean K. Drysdale tried to abduct a 16-year-old boy walking to school in the area of 162nd Street and Carse Avenue in Harvey, according to a statement from Harvey police.

Drysdale, 43, was driving his green 4-door Chevrolet Sedan alongside the boy but the boy immediately ran back home to his parents, police said.

Two Harvey Public Works Department employees saw what happened, approached Drysdale, and called police from their cell phones, the statement said. The boy’s parents also called police.

The South Holland resident was taken into custody and positively identified by the boy and the city employees, police said. The Cook County State’s attorney’s office approved a charge of child abduction.

Drysdale was recently released from prison, where he served 10 years for the criminal sexual assault of an 11-year-old Lynwood boy, police said.

(Source: Sun-Times Media Wire © Chicago Sun-Times 2015. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed.)