South Dakota man pleads guilty to 2nd-degree murder in stepson's death

The man accused of killing his 18-month-old stepson has pleaded guilty to second-degree murder.

Keith Cornett entered an Alford plea on Friday morning in a Minnehaha County courtroom. Which means he is not admitting guilt but acknowledging there's enough evidence to convict him. The court treats it the same as a guilty plea. As part of a plea deal, prosecutors dropped a first-degree murder charge against Cornett.

Prosecutors say Cornett killed his stepson, Hayden Wigton, in 2016.

Wigton was found unresponsive in a home in Dell Rapids on December 7 of 2016. Authorities said an autopsy showed the boy suffered from a skull fracture after being hit in the head six times, and that bite marks were also found on the child's body.

Cornett's sentencing date has been set for May 30.