Why Yevgeny Prigozhin’s private jet plummeted into a field northwest of Moscow is still a mystery. The Russian military leaders he tried to oust with his armed rebellion remain in power. His mercenary army is under new management.

And President Vladimir Putin, whose authority was badly dented by the short-lived mutiny, seems as strong as ever, with Prigozhin’s fiery death sending a chilling message to anyone challenging him.

A month after Prigozhin was killed in a suspicious plane crash, the Kremlin seems to be succeeding in keeping the demise of the profane and outspoken Wagner chief as low-key as possible—a strategy underlined by Putin’s absence at his funeral and troops keeping the media from entering Porokhovskoye Cemetery in St. Petersburg for his Aug. 29 burial.

Prigozhin’s funeral was “the culmination of a covert operation aimed at his elimination,” said Tatiana Stanovaya, a senior fellow at the Carnegie Russia Eurasia Center. It was conducted under the strict oversight of security agencies, “shrouded in secrecy and involved deceptive tactics,” she noted.