A Dakota County grand jury indicted a South St. Paul man Wednesday on charges of first-degree premeditated murder and second-degree intentional murder in connection with the stabbing death of a woman at his home.

Thomas Michael Luby, 58, was arrested Aug. 7 and charged with second-degree murder after calling police to the 500 block of 9th Avenue S. and telling them he killed Kelly Ann Anderson, 45, also of South St. Paul.

Luby initially told officers he stabbed Anderson in self-defense, the charges said.

However, the Hennepin County medical examiner found two deep lacerations consistent with defensive wounds, according to charges. The autopsy also revealed two deep cuts on her right jawline, a stab wound to her chin, lower teeth and mouth, and stab wounds to her neck that severed her jugular vein and carotid artery.

When police arrived on Aug. 7, they also found a knife in Anderson’s hand. According to a search warrant filed in Dakota County, Luby said he didn’t know how the knife got there. He also said he had no memory of placing the 911 call or calling Anderson’s mother.

Luby will return to court Monday for his first appearance since the indictment.