The witness said that "three armed members of the Krajina militia" broke into his house in Bruska, a village near Benkovac in southern Croatia, on the night of 21 December 1991 as he, his brother, his father, his uncle and a neighbour were playing cards.
"They took us out of the house, lined us up by the wall and started shooting," said Marinovic.
He described how his uncle and the neighbour started running, so the militia shot at them, killing them by the yard's gate, while he, his father and brother fell to the ground.
"I was wounded with five bullets. I fell to the ground and lost consciousness. When I came to, I saw my father and my brother dead beside me," said the witness.
He added that he learned at the hospital in Knin that another six civilians had been killed in the attack on Bruska.
Asked by the prosecutor if he knew why they had been killed, Marinovic said, "Only because they were Croats". He also confirmed that all civilians were unarmed and did not put up resistance.
Another victim of the slaughter at Bruska, Jasna Denona, who had also been wounded, testified at the Martic trial on February 9.
Martic, the interior and defence minister of the Republic of Serb Krajina, a former self-styled statelet in Croatia, was accused of war crimes against Croatian civilians in Serb-occupied areas from 1991 to 1995, for crimes in Bosnia and Herzegovina, and for the 1995 shelling of Zagreb.