The killings
Late on December 7, 1991, armed members of a Croatian Interior Ministry reserve unit associated with Tomislav Merčep went to the Zec family home in Zagreb's Trešnjevka district. Contemporary and later Croatian reporting states that Mihajlo Zec was killed outside the home as he tried to flee.
Marija Zec and her 12-year-old daughter Aleksandra were then taken from the home to the Adolfovac area on Sljeme, where they were killed. Two other children in the family, Gordana and Dušan, survived.
Arrests and confessions
Police soon arrested members of Merčep's unit, including Munib Suljić, Igor Mikola, Siniša Rimac, Nebojša Hodak and Snežana Živanović. Croatian reporting records that some suspects gave confessions during the investigation.
Those statements became the central procedural problem. For an offense carrying such severe punishment, Croatian law required defense counsel during questioning. The confessions had been taken without lawyers present and were therefore excluded from evidence.
The failed prosecution
Once the inadmissible statements were removed, the prosecution did not secure murder convictions. The defendants were acquitted, and the Zec family killings never received a final judgment assigning criminal responsibility for the three deaths.
This is why Crime by Region does not label any acquitted person as a convicted murderer, even where historical reporting states that confessions had been made. An admission later excluded from the criminal case is not the same thing as a final adjudication.
Compensation and public reckoning
The legal failure remained a public issue for decades. The surviving children sought compensation from the Croatian state. HRT reported in 2021 that Gordana and Dušan had received 1.5 million Croatian kuna in compensation years earlier.
At the 30th-anniversary commemoration in December 2021, Zagreb mayor Tomislav Tomašević became the first city mayor to attend a formal commemoration at the site. HRT described the murders as a crime for which no one had been held criminally accountable.
Timeline
December 7–8, 1991: Mihajlo, Marija and Aleksandra Zec are killed in Zagreb.
December 1991: members of a reserve-police unit are arrested; some make statements admitting involvement.
1992: the murder prosecution fails after key confessions are excluded because they were obtained without required defense counsel; the defendants are acquitted.
2004: the surviving children pursue state compensation; later reporting records a settlement totaling 1.5 million kuna.
December 7, 2021: Zagreb marks the 30th anniversary with a city-level commemoration at Adolfovac.
What remains unresolved
The historical event is extensively documented, but there is no final murder conviction. The absence of an adjudicated offender is a material legal fact, not a reason to erase the record. The case therefore remains Unsolved / Partial in this archive: the victims and circumstances are documented, while criminal accountability for the killings was never successfully established in court.
Sources
- HRT — December 7, 2021: 30th-anniversary account, failed prosecution and compensation
- Index.hr — December 7, 2021: victims, arrests, confessions and exclusion of statements
- HRT — December 7, 2019: locations, victims and reserve-unit context
- Index/Hina — April 16, 2004: surviving family members' compensation claim and prosecutorial context