William A. Inman pleaded not guilty on Tuesday morning to charges of aggravated murder, murder, tampering with evidence and gross abuse of a corpse.
His son, William Inman II, entered not guilty pleas to the same charges on Monday.
The two are accused of strangling Summer Inman, who was the younger Inman's estranged wife.
Both men were already charged with kidnapping, as was William A. Inman's wife, Sandra.
Summer Inman disappeared on March 22 from an area behind a bank where she was working. Her body was found eight days later in a septic system near a Nelsonville church.
Summer and William A. Inman II were married in 2004 but the couple separated last year, 10TV News reported. Since then, she was granted a civil protection order and filed for divorce. In court documents, Summer Inman claimed that her husband "threatened to kill" her if she ever "took the children from him." She also said her husband would take her car keys, wallet and cell phone to leave her "captive" in the couple's home.
A trial date has not yet been set.
Watch 10TV News HD and refresh 10TV.com for continuing coverage.
May 23, 2011:
Husband, Father-In-Law Indicted In Logan Woman's Death
April 22, 2011: No New Charges Yet In Logan Woman's Kidnapping, Death
April 14, 2011: Woman Pleads Not Guilty By Insanity In Daughter-In-Law's Alleged Kidnapping
April 4, 2011: Community Mourns Summer Inman
April 4, 2011: Funeral Today For Slain Logan Mother
April 1, 2011: Only Witness To See Woman's Abduction Discusses Ordeal
March 31, 2011: Video Shows Alleged Kidnapper's Violent Streak
March 31, 2011: $1M Bonds For Family Members Charged In Kidnapping
March 30, 2011: Coroner: Logan Mother Was Strangled
March 30, 2011: Mother In-Law Led Police To Woman's Body
March 30, 2011: Body Of Missing Logan Woman Found In Church Septic System
March 29, 2011: Investigators May Have Located Missing Woman's Body
March 29, 2011: Family Suspected In Logan Mom's Disappearance 'Controlling,' 'Scary'
March 28, 2011: Vigil Planned For Missing Logan Mom
March 27, 2011: Investigators, K9s Search 4 Counties For Missing Logan Mom
March 26, 2011: FBI: Missing Mom May Not Be Found Alive
March 25, 2011: Missing Woman's Husband, In-Laws Charged With Kidnapping
March 24, 2011: 3 Arrested In Kidnapping Of Logan Mom
March 24, 2011: Search Continues For Missing Logan Woman
March 23, 2011: Police: Woman Kidnapped Along Logan Street