LOUISVILLE, Ky., (WDRB) -- A Louisville Metro Police detective is under criminal investigation for allegedly sending "sexually explicit" texts, pictures and videos to a woman he arrested last April, according to court records.

Det. Carl Payne is on administrative assignment pending a criminal investigation into allegations made by Chaka Murrell, who was arrested by Payne on a drug charge on April 25.

Payne is a member of the department's VIPER Unit, put together in 2012 to go after Louisville's most dangerous criminals. The head of that unit, Lt. Kit Steimle, is also under investigation and is on administrative reassignment, according to police.

Police officials have not said why Steimle is the subject of a "professional standards investigation."

Brian Butler, an attorney representing Payne, said they are cooperating with the investigation.

"We are hopeful this will be resolved without any charges being filed," Butler said.

He wouldn't comment on specifics about the allegations because the investigation is pending.

According to a Feb. 5 search warrant, Murrell gave an official statement reporting that Payne sent her sexually explicit texts, pictures and videos from his cell phone. The department's public integrity unit obtained her phone.

Payne was already one of more than two dozen officers whose names and disciplinary issues have been turned over to prosecutors – and perhaps defense attorneys – as part of a new LMPD policy.

As of Nov. 25, the department implemented a policy to provide prosecutors with a continually updated list of officers who are under investigation or have been disciplined for something that could cause their credibility to be questioned at trial and could be considered exculpatory evidence for the defense.

Leland Hulbert, a spokesperson for the Commonwealth's Attorney's Office, said they are aware of Payne and Steimle's issues but are waiting for police investigators to make an official determination.

Payne is on the list already because he was arrested in Hardin County on June 19 on a drunken driving charge.

In October, he was suspended for 20 days by Chief Steve Conrad for driving under the influence.

In 2010, Payne was reprimanded four missing court, according to his personnel file.

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