Court Hears How A Baby Died From 'Nappy Rash'

WARNING: Distressing content.

"He died of diaper rash. That's right, diaper rash."

That was the opening statement Assistant Attorney General Colemasn McAllister told the jury during a trial in Mount Pleasant, Iowa, where Zachary Paul Koehn stands accused of murder after his infant's son body was found hanging in a baby swing on August 30, 2017.

The baby's nappy was so soiled, insects had laid eggs which hatched into maggots, causing a rash to break through the skin where E. Coli and bacteria set in.

A coroner's report shows the four month old boy, Sterling, died of malnutrition, dehydration and infection.

Zachary Koehn, left, with defense attorney Steven Drahoza. Image: WFC Courier

Reports suggested he had been in the same nappy for up to 14 days.

The father called 911 to report his son's death on Tuesday and was described as emotionless when he led first responders to his son's lifeless body.

The horrific moment emergency services attended the scene was described by county rescue squad Toni Friedrich.

The baby's "eyes were open, and it was a blank stare" she told the court.

Koehn, left, with defense attorney Steven DrahozaImage: WFC Courier

Friedrich described the baby's clothing as crusty and said insects flew into the air when she removed Zachery's baby blanket.

The father's  attorney has called the baby's death a tragedy, not a crime.

McAllister denied the defense on the basis that Koehn and his partner, Cheyanne Harris, also had a two year old daughter who was in good health, and despite the father being a drug user, there was money in the house for food and baby supplies.

The baby's mother is also facing a separate trial at a later date.