A Waterloo man convicted of sexually abusing a girl he was babysitting in 2016 has died in prison, according to the Waterloo Cedar Falls Courier. 74 year old Marvin Heggebo died in the hospice room at the Iowa State Penitentiary in Fort Madison on November 19th. In 2016 he sexually abused the four year old girl he was babysitting. He was sentenced to a 25 year sentence in 2017. He died of natural causes.