Russia's worst-ever serial killer - who has confessed to killing 83 women - wishes he had been executed

Russia's worst-ever serial killer, who has confessed to killing 83 women and has been branded The Werewolf, has said he wishes he had been executed.

Former policeman Mikhail Popkov, 56, is currently serving a life sentence at a penal colony in Mordovia after being convicted of killing 81 women - many of whom he also raped.

The serial killer, who only recently admitted to another two murders in the 1990s, has now expressed 'regret' for the first time over his reign of terror.

But police believe his final toll will be higher still with a senior investigator working on the case predicting more than 100 and possibly 'closer to 200'