YANKTON – A Yankton man was found guilty of second-degree murder Tuesday by a Yankton County jury.

Stephen R. Falkenberg, 45, of Yankton, was found guilty of second-degree murder, a Class B felony, and guilty of first-degree manslaughter, a Class C felony. Those charges stem from the March 1, 2019 death of 46-year-old Tamara LaFramboise, of Yankton.

La Framboise’s body was discovered in Menominee County, Michigan, on March 16, 2019. The charges carry punishments of mandatory life imprisonment and up to a $50,000 fine for second-degree murder, and an additional $50,000 fine for the manslaughter charge.

Falkenberg is scheduled to be sentenced on March 2 in Yankton.

Court documents stated that Falkenberg was in a relationship with LaFramboise when he engaged in an argument with her at her Yankton apartment. He later pushed her and caused her to hit her head and die. Falkenberg later dismembered the body to conceal her identity in Michigan, according to court documents document.

The South Dakota Attorney General’s Office handled the prosecution and the investigation was conducted by the South Dakota Division of Criminal Investigation, the Yankton County Sheriff’s Office, and the Yankton Police Department, the FBI, and Michigan authorities.