A convicted murderer was mistakenly released from Miami-Dade County's jail over the weekend, prompting a multistate manhunt led by U.S. Marshals as corrections officers face an internal investigation.

Authorities said James Edward Daniels, nicknamed "45," is considered armed and dangerous.

Daniels walked out of Turner Guilford Knight Correctional Center (TGK) on Saturday after what Miami-Dade corrections officials called a "procedural error."

"A full Internal Affairs investigation is underway to review the circumstances surrounding this incident and any potential failures to follow department policy," a corrections spokesperson said in a statement.

Manhunt for James Edward Daniels

Daniels has a violent history. Five years ago, investigators say, Daniels and at least two others kidnapped, tortured, and robbed three men in Opa-locka. Two victims — Osmar Oliva and Johan Gonzalez Quesada — died.

After serving time for the murders in a state prison in Lake City, Florida, Daniels was transferred to Miami-Dade custody last Wednesday to face additional local charges. Instead, he was mistakenly released two days later.

Federal agents called in

The Miami-Dade Department of Corrections notified the FBI and U.S. Marshals to locate Daniels. State, county and federal agents are now searching for him.

Larry Seward of CBS News Miami reported live from TGK that U.S. Marshals did not learn about Daniels' release until a full day later. It remains unclear why county staff waited so long to request federal assistance.

Corrections officers under investigation

Corrections leaders pledged accountability for the error. "While the immediate focus remains on returning Daniels to custody, anyone involved in this mistake will be held responsible," the department said.

Authorities warn public

Because of his past convictions, authorities continue to warn the public that Daniels should be considered dangerous.