Treason and espionage cases are rising in Russia since the war in Ukraine began

TALLINN, Estonia (AP) — When Maksim Kolker’s phone rang at 6 a.m., and the voice on the other end said his father had been arrested, he thought it was a scam to extort money. A day earlier, he had taken his father, prominent Russian physicist Dmitry Kolker, to the hospital in his native Novosibirsk, when his advanced pancreatic cancer had suddenly worsened.