The youngster was found injured after ambulance crews were called to a park in Heanor on June 18 and died later that day, sa politiet.
A man has been remanded into custody after being charged with the murder of an 11-year-old boy.
Ambulance crews were called to Shipley Country Park in Heanor, Derbyshire, on the afternoon of Saturday June 18, sa politiet.
Unggutten, who cannot be named for legal reasons, was found with serious injuries and died later that day, sa politiet.
Detectives said investigations led to the arrest of a man last week, and they later charged Michael Harrison with murder.
At Southern Derbyshire Magistrates’ Court on Monday, the 41-year-old spoke only to confirm his name, address and date of birth during a short hearing.
Harrison has also been charged with engaging in coercive and controlling behaviour.
Police have urged anyone with information to speak to them, and have also asked for information about the whereabouts of a Vauxhall Combo van displaying one of the following licence plates: FL54 JBJ, FL54 JDJ or FG57 FTO.
Harrison, who told the hearing he is of no fixed address, is due to appear at Derby Crown Court på tirsdag.