Sheremet was a reporter for the internet news medium Ukraninian Pravda and had been an outspoken critic of the leaders of Belarus, Ukraine, and Russia. Aide to the interior minister said that his professional work was likely a motive for the murder.
The founder of Ukraninian Pravda, Georgiy Gongadz, was kidnapped and murdered 16 years ago.
Sheremet has been described by The New York Times as "known for his crusading reports about political abuses in Belarus" and "a thorn in the side of Lukashenko's autocratic government".
In his last blogpost, Sheremet had wrote that some militia commanders from the east Ukraine conflict had evaded judgement for past crimes.
medium (plural: media) - ways of giving information to people (newspapers, television, websites, etc.)
outspoken - very direct and honest when sharing one's opinion
critic - someone who (formally) complains about something
motive - reason for doing something
founder - the person who started a business or organization
militia - an army of non-professional soldiers
evade - escape