John Carter, the fiancé of Ohio art student Katelyn Markham, has been sentenced to three years in prison for involuntary manslaughter in connection with her 2011 disappearance and death. Carter, initially charged with two counts of murder, pleaded guilty as part of a plea deal. Markham's skeletal remains were found in 2013, and authorities ruled her death a homicide. Despite the sentencing, Carter has not provided an explanation for how or why he killed Markham. Markham's father expressed ongoing grief and urged the judge to impose the maximum sentence, highlighting the pain endured by many over the past 13 years.