Bones Under the Ice by Mary Ann Miller

Jhonni Laurent is the first female sheriff of Field' s Crossing, Indiana— and now she has her first murder case
Two days after a blizzard hits Field' s Crossing, Indiana, Sheriff Jhonni Laurent discovers the frozen body of a high school senior under a fifteen-foot pile of snow and ice. Murder is rare in farm country, and this death marks the beginning of Jhonni' s first homicide case.
Just as the investigation gets underway, Jhonni' s opponent for sheriff from four years ago wages a bitter reelection battle to oust her. Then, Jhonni finds another body, and further complications arise when a century-old feud between two families reaches its breaking point.
Soon, a slew of newspaper articles causes the Indiana State Election Board to doubt her credibility. Jhonni must fight to maintain her reputation, keep the small farming community together, and find the murderer at large— all while demons from her own past threaten to crush her. Can she find the killer and mend...