Rotten to the core?
To outsiders, Cheyanne Harris and her partner Zachary Koehn seemed like ordinary parents.
The couple already had a two-year-old daughter when their son Sterling arrived in April 2017.
Zachary, then 27, had a good job as a lorry driver, transporting chickens from Wisconsin to Iowa, where the family lived.
He earned $45,000 a year (around £37,000) and had access to healthcare through his job.
However, this seemingly normal family was rocked by a tragic death
