A murder series in Mariupol
Dovzhenko had worked as a police operative in Mariupol before becoming the defendant in one of the city's most consequential serial-murder prosecutions. Ukrainian public-broadcaster archive material identifies him as a former police officer and records that the case concerned killings committed between November 1999 and May 2002.
The victims did not fit a single simple profile. Contemporary UNIAN material from the sentencing says the proved cases included four police employees and a 12-year-old girl. Later Ukrainian reporting also describes businesspeople, women and an overseas national among those killed. Rather than turn those categories into a sensational catalogue, the important editorial point is that the prosecution treated the events as a connected series and established Dovzhenko's responsibility for 17 murders.
Arrest and the end of the series
Suspicion converged on Dovzhenko in 2002. Suspilne's archival description places his arrest on May 17, 2002. Later reporting says a former police colleague recognized him after another killing and that he was taken into custody within hours. The arrest brought the series to an end and opened a prosecution that would continue through 2003.
Because Dovzhenko had himself worked in law enforcement, the case carried an institutional dimension beyond the killings. Reporting on his background discusses an earlier dispute over evidence and his departure from police work. Crime by Region does not use those disputed earlier events as proof of motive for every later homicide; motive must be distinguished from the acts the court actually adjudicated.
Trial and life sentence
Proceedings were under way in Mariupol by January 2003. On September 8, 2003, a visiting panel of the Donetsk Regional Court of Appeal found Dovzhenko guilty of 17 murders and sentenced him to life imprisonment. UNIAN documented the sentencing that day, and Suspilne's media archive preserves footage and a description of the criminal case.
Some later Ukrainian media summaries use a total of 19 killings for the wider series. That higher number may reflect investigative attribution or later reconstructions, but it is not substituted here for the court result. The legally anchored figure on this page is 17 murders proved at sentencing.
What the source disagreement means
True-crime archives often accumulate inflated victim counts when investigative suspicions, confessions and convictions are blended together. This file does the opposite. It records that sources exist for a 19-killing figure while reserving the label “convicted of” for the 17 murders documented by UNIAN in the 2003 judgment.
The same caution applies to motive. Dovzhenko was reported as describing revenge against people he believed had wronged or mocked him, while other coverage identifies financial gain in some crimes. Those explanations are presented as reported motive evidence rather than a universal psychological explanation imposed on every victim.
November 1999: Ukrainian archival reporting places the beginning of the proved murder series in Mariupol.
May 17, 2002: Dovzhenko is arrested.
January 2003: court proceedings are documented in Mariupol.
September 8, 2003: he is found guilty of 17 murders and sentenced to life imprisonment.
Later reporting: some sources use a 19-killing total; this archive retains 17 as the adjudicated count.
Current status
The case is classified Solved / Adjudicated. Serhiy Dovzhenko received life imprisonment after a court found him responsible for 17 murders. Broader victim totals are not treated as additional convictions without equivalent judicial documentation.