PRESTONSBURG, Ky. (WMDJ) – One of the three suspects arrested this week in the murder of Amber Spradlin has been released on bond.

Dr. Michael McKinney, 56, of Martin, has been released from the Floyd County Detention Center after posting a $250,000 cash bond. Dr. McKinney will be on home incarceration and will be required to wear a GPS monitor.

His son, Michael K. “MK” McKinney, 24, of Martin, who’s been the only person formally charged in the murder of Spradlin, had his bond set at $5 million by Judge Eddy Coleman on Wednesday. He remains in custody.

Also still in custody is a third suspect, Josh Mullins, 23, of Martin, who’s bond was set at $100,000 cash.

All three men enter not guilty pleas during yesterday’s arraignment.

Dr. McKinney and Mullins were each charged with seven counts of tampering with physical evidence to potentially cover-up the murder. MK McKinney was charged with tampering and one count of murder.