Grant Hardin in police photo. Stone County Arkansas Sheriff's Office

The manhunt continues for Grant Hardin, the escaped former Arkansas police chief serving a 30-year sentence for murder and rape, as officials enter their fourth day of search efforts.

Grant Hardin, 56, who has been in prison since 2017 for first-degree murder and rape, escaped the Calico Rock North Central Unit on Sunday at approximately 2:50 p.m., the Stone County Sheriff's Office said in a statement .

Hardin escaped custody through a sally port by impersonating a corrections officer "in dress and manner," which caused another corrections officer "operating a secure gate to open the gate and allow Hardin to walk away from the North Central Unit," according to an affidavit obtained by ABC News.

Surveillance fo

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