Ukraine, Spain to merge Portnov killing investigations
Suspect in killing of ex-Yanukovych aide Portnov obtained Russian passport
Germany weighs extraditing Portnov killing suspect
Portnov murder suspect arrested in Germany
Family of murdered Yanukovych aide amassed Dubai real estate portfolio worth over $2 million
Portnov was in Ukraine days before his murder — report
Spain classifies Portnov murder investigation
Spanish police still seeking suspects in Portnov’s Madrid murder
Controversial ties, gas deals with Putin, and loyalty to Yanukovych: the murky political career of Andriy Portnov
Portnov lived near school where he was gunned down, suspects still at large — media
At least three shots to the head: El País reveals new details in Portnov’s killing
Video surfaces from scene of Andriy Portnov’s killing in Spain
Ukraine’s ex-presidential aide gunned down in Madrid