Interior Minister Vitaly Zakharchenko was quoted by local media as saying that several antiques appeared to be missing from the home of Volodymyr Trofimov, 58, who had a collection of rare coins, military medals and china statuettes.
An Interior Ministry statement said "all versions (being looked into by investigators) are based on the same conclusion: this crime was carefully planned and thought out in advance."
Quoting state prosecutors, Ukrainian newspaper Segodnya said Trofimov's cases as a district court judge in recent years were limited to alimony payments, petty theft and debt collections.
The lock on the door of Trofimov's flat, located in a Soviet-era apartment block, was intact, according to the newspaper. Investigators have yet to find the heads of the dead, whose bodies were found on Saturday.
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