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FORD HEIGHTS, Ill. — Authorities are searching for an armed and dangerous murder suspect in the south suburbs.

Some schools went on lockdown today as a precaution as police pursued 24-year-old Rashad Williams.

Police say he shot and killed 38-year-old  Tyrone Hardin, a railway security guard, over the weekend.

A witness spotted William near a school in Ford Heights.

Two schools in the area were then put on lockdown. Teachers and kids at the two schools are safe.

Williams was not found and remains on the run tonight.

Hardin, who lived in Merrilville, was a father of a 5-year-old and stepfather to four other children. He was at the rail yard as a  second job to earn extra money to buy his children presents for Christmas, according to his family.