Nickalas Kedrowitz, now 17, was 13 when he murdered Desiree McCartney, his 23-month-old half-sister, and Nathaniel Ritz, his 11-month-old stepbrother. Kedrowitz was found guilty of two counts of murder in August 2021. The judge sentenced each death to 50 years in jail, to be served one after the other. Desiree was murdered in May 2017 and Nathaniel was murdered in July 2017, and both children were discovered unresponsive at the family’s house in Osgood, Indiana, roughly 60 miles southeast of Indianapolis. Desiree was found dead after Kedreowitz had been left to look after the toddler. He told …