The U.S. state of Maryland abolishes capital punishment for future offenders.
Twenty-one men are executed by a firing squad in Galkayo, in the semi-autonomous state of Puntland, Somalia, after they were convicted of being members of the jihadist group al-Shabaab. It is the largest number of executions of members of the group in Puntland. While the executions were being carried out, al-Shabaab gunmen attacked the town of Wisil, Mudug, killing 20 soldiers.
The Tokyo District Court sentences serial killer Takahiro Shiraishi, dubbed the "Twitter killer", to death, for murdering nine people at his apartment in 2017 and dismembering their bodies. Shiraishi, who was found mentally competent, pled guilty and told the court his crimes had a sexual motive.
After the jury fails to reach a unanimous decision, a Baltimore, Maryland, judge declares a mistrial in the trial of police officer William Porter, the first officer to be charged in the death of Freddie Gray.