Imprisoned for alleged drug possession, Kilpatrick, 24, escaped with 11 other inmates, but is the only one who has not been caught.
The manhunt continues for one inmate still on the run.
The Walker County Sheriff's Office announced the escape In a Facebook post Sunday.
Multiple law enforcement agencies have joined the Walker County Sheriff's Office in searching for the escapees by ground and air.
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The inmates are between 18 to 30 years old and were jailed on charges ranging from disorderly conduct to attempted murder.
The Birmingham News reported that the jailbreak happened around 6:30 p.m. last night. You've got to stay on your toes. And they scheme all the time to con us and our employees here at the jail. This is one time we slipped up.
Underwood added that he's not going to make excuses but it was a human error from a young lad.
The Latest on the escape of 12 inmates from a county jail in Alabama. Lamb and McGuff are in jail for charges which include attempted murder.
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Underwood said the inmates' plan was "well laid out", and they took advantage of an inexperienced employee. "They love peanut butter sandwiches", Underwood said, according to ABC News. Ten inmates were recaptured shortly after their escape.
A $500 reward is being offered for information that leads to an arrest of the escapees. Later, it was discovered that the prison tailor, Joyce Mitchell, had smuggled tools to the men in hamburger meat. He says the inmates "went off in every direction", but everyone except Kilpatrick was captured with in eight hours.
El Chapo famously escaped from a maximum-security prison through a deep, high-tech, 1-mile tunnel.
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