Grekov was accused of participating in the White Movement in the Crimea during the civil war, and in 1930, his son was arrested in connection with the "Platonov Affair" and sent to the Solovki Islands Penal Colony.
Grekov was charged with involvement in the White Movement in Crimea during the civil war, and in 1930, his son was detained for the "Platonov Affair" and sent to the Solovki Islands Penal Colony.