By Jennifer Lilonsky (staff@latinospost.com) | First Posted: May 08, 2013 04:37 PM EDT

A suspect in the Cleveland kidnapper case, accused of holding three women captive for 10 years, was the target of a police investigation in 2004 for abducting and endangering children.

The suspect, 52-year-old Ariel Castro, reportedly drove a boy around instead of dropping him off at school and ordered the child to "lay down, b----." He was fired from his job as a school bus driver in 2012.

Castro was arrested, along with his two brothers Pedro, 54, and Onil, 50, after the three women escaped from his home Monday night.

The identities of the three women who were abducted are Michelle Knight, 21, Amanda Berry, 16, and Gina DeJesus, 14.

Shortly before DeJesus went missing in 2004, investigators looked into Castro's possible connection with abduction and child endangering, according to a disciplinary file from the Cleveland metropolitan school district.

The report says that Castro left the boy he abducted in 2004 on the bus alone while he ate at a Wendy's fast-food restaurant.

Castro "returned to the bus and drove around for a while. [He] parked the bus at a parking lot for a period of time" and then eventually released the boy about two hours later," according to the report.

Police even visited Castro's home where the three women escaped Monday night during their 2004 investigation, but left after no one was home and never returned.

At the conclusion of the investigation, Castro was found not have broken any law and only received a 60-day suspension from the school board.

Cleveland mayor Frank Jackson admitted that the details of the case are disconcerting. "We are happy that they are returned to us. But we have several unanswered questions. Why were they taken, how were they taken and how did they remain undetected in the city of Cleveland for this time?"

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