Matthew Kinne, a White police officer in Oxford, Mississippi, has been charged with the murder of Dominique Clayton, who was found dead Sunday. According to CBS-affiliate WREG News Channel 3, the Mississippi Bureau of Investigation arrested Kinne, who they say might have been in a relationship with the Black 32-year-old mother of four.

Jeff McCutchen, interim chief of police in Oxford, discovered that Kinne was possibly in a relationship with Clayton early on in the investigation. The department brought in the Mississippi Bureau of Investigation to ensure an "independent" and "unbiased" inquiry.

"We want to assure you that we will not hide behind our badge," McCutchen said. "Our hearts go out to the family of Dominique Clayton. To the family, we thank you for your patience and your trust in us to see this through."

Authorities have not revealed the details of Clayton's death, except to say that she was killed in a homicide.

Shyjuan Clayton, the victim's sister, expressed her disappointment over the lack of details regarding Kinne's arrest. "Hopefully, he'll get convicted," she said. "We'll get justice for my sister."

Kinne is set to appear before a judge Wednesday to determine whether a law requiring probable cause to arrest a police officer applies in this case. According to the media outlet, "the extra step before an arrest is only required when police officers and certain other public employees are accused of crimes while on duty." Reports say Kinne was not performing law enforcement duties at the time of Clayton's killing.

The hearing will also establish whether Kinne will receive bail.