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Warning: This article contains disturbing details and may be upsetting to readersAn Iowa woman whose infant son’s lifeless body was found in a baby swing has been imprisoned for life without possibility of parole.Court records say 22-year-old Cheyanne Harris was sentenced Tuesday in New Hampton to the state-mandated penalty, and her request for a new trial was denied. A jury found her guilty Feb. 6 of first-degree murder and child endangerment causing death.The charges stem from the death of 4-month-old Sterling Koehn, whose body was found Aug. 30, 2017, in a maggot-infested diaper at an apartment in Alta Vista. The swing was in a sweltering bedroom. An autopsy shows he died of malnutrition, dehydration and an E. coli infection.The Des Moines Register reports the hot room Sterling Koehn was in attracted flies that hatched into maggots while he was still alive. They crawled in his clothes and his diaper for days, prosecutors said. A forensic entomologist who examined insects on Sterling's body concluded the baby had been in his swing for nine to 14 days in the same diaper.A public defender insisted that while the boy's death was tragic, it was not planned. Attorney Nichole Watt said Harris suffered from postpartum depression and self-medicated, but she had no desire to harm her son."The monster, in this case, is mental health," Watt said.Criminal Investigation Agent Chris Callaway testified that Harris said: "I should have checked on him more," the Waterloo-Cedar Falls Courier reported.The baby’s father, Zachary Koehn, also has been sentenced to life in prison.Prosecutors argued that Koehn was a meth user who also provided Harris with drugs. According to the Des Moines Register, Koehn admitted he took better care of his dog than he did the infant when being cross-examined. During the week-and-a-half Sterling was left in the swing, the couple continued to feed and care for their 2-year-old daughter.Assistant Attorney General Denise Timmins told jurors that Koehn was home often enough to know that the baby wasn’t being cared for and did nothing to help him.“He let Sterling rot in that room. He left him there to die,” Timmins said.