A court in Slovakia is expected to issue a verdict Thursday in the slayings of an investigative journalist and his fiancee, a crime that shocked the country and led a government to fall.

The state prosecution has requested 25-year prison terms for three remaining defendants, one of them a businessman accused of masterminding the killings. They all pleaded not guilty to murdering journalist Jan Kuciak, and fiancee Martina Kusnirova, both aged 27.

But the trial at the Specialized Criminal Court in Pezinok, which handles Slovakia's most serious cases, might not be coming to an end, yet.

A three-judge tribunal originally was set to deliver a verdict in early August but delayed its decision, citing a need for more time.

Prosecutors submitted additional evidence on Monday. The panel could decide to postpone the verdict again to give them a chance to present the evidence in court.

Kuciak was shot in the chest and Kusnirova was shot in the head at their home in the town of Velka Maca, east of Bratislava, on Feb. 21, 2018.

The killings prompted major street protests unseen since the 1989 anti-communist Velvet Revolution in Czechoslovakia. The ensuing political crisis led to the collapse of a coalition government headed by populist Prime Minister Robert Fico and to the dismissal of the national police chief.

Kuciak had been writing about alleged ties between the Italian mafia and people close to Fico when he was killed, and also wrote about corruption scandals linked to Fico’s leftist Smer - Social Democracy party.