He confessed to killing a total of twelve people, however, the investigation could only bring forward enough evidence to convict him of six murders.
Sergeychik's father was an alcoholic who often beat his wife and children, and then completely abandoned the family for another woman.
Sergeychik graduated with honours from the Ministry of the Interior Academy of the Republic of Belarus, married, and had two children.
Sergeychik committed his first crime on 18 September 1992, having stolen a trailer on the collective farm "Oktyabr", after which he began to break into garages, stealing cars and other property.
He committed his first murder in April 2000, when he picked up 21-year-old Helen Boltak as a travelling companion, driving her 76 km in the Shchuchyn District forest, where he drank a bottle of alcohol prepared beforehand.
They engaged in sexual intercourse, and when she lost consciousness, he strangled her, doused her with gasoline and lit her on fire after taking her jewellery and cash.
According to his confession, after a quarrel with her about divorcing his wife, "in a fit of anger" and "under the influence of alcohol", he strangled her with a TV cable, then staged her suicide by hanging her in the bathroom, after which he took all the cash from the apartment that he could find.
Initially, the criminals drove a car several hours along the streets of Grodno unsuccessfully searching for a suitable victim.
In November 2003, Sergeychik, while on duty, beat up a detainee in the workplace and used a gas canister against him, as a result of which he had to call for an ambulance, but the case was ignored.
In February 2006, Sergeychik, in a state of intoxication, quarrelled with his wife and came to his friend's mistress Natalia Bazis.
Sergeychik returned to the apartment where he beat up Bazis, then raped her, strangling her with her bra and leaving the corpse in the bathroom.
Sergeychik was accused of committing murders with "special cruelty to conceal another crime from hooligan motives", rape, and theft of property, including theft of firearms, illegal carrying, storage, transportation of firearms, ammunition, explosives and explosive devices.
[2] On 22 May 2007, Sergeychik was found guilty of all charges, and sentenced to an exceptional penalty by the Grodno District court - death through execution with confiscation of all his property.
As a result, the first deputy head of the Ministry of Internal Affairs RB Alexander Shchurko was warned.