Four-year-old Kevin Hjalmarsson was found dead in Arvika, Sweden on 16 August 1998. Two brothers, then five and seven years old, were accused of murdering him and were claimed to have confessed. The brothers were extensively investigated and interrogated, but they were never charged with a crime. On 27 March 2018, all suspicions against both brothers were dismissed by Swedish police after a lengthy second investigation of the case. Each brother was expected to receive one million SEK in damages. Case.
https://en.wikipedia.org/wiki/Death_of_Kevin_Hjalmarsson