Cerciello Rega was a Carabinieri police officer and was killed in the Italian capital in July 2019.
The decision comes after Natale Hjorth’s sentence was reduced on appeal from 22 years to 11 years and four months earlier in July.
The court ruled that he should stay under house arrest at his grandmother’s home in Fregene, a town on the coast near Rome.
The victim’s wife was “totally shocked” by the decision, her lawyer said in a statement.
The other young American convicted of the killing, Finnegan Lee Elder, had his sentence cut to 15 years and two months in prison from 24 years.
Elder was found guilty of killing Cerciello Rega with 11 stab wounds inflicted by a combat knife he had brought over from the US.
Natale Hjorth assaulted the slain officer’s partner at the end of a chain of events sparked by a drug deal that went wrong.
ANSA
