Eleven persons of the minority community were killed in the violence at Naroda Gam here during the 2002 post-Godhra riots. Former Gujarat minister Mayaben Kodnani is one of the 79 accused in the case.
The case was probed by the Supreme Court-appointed special investigation team.
P L Mall, the investigating officer, deposed before special court judge P B Desai over the last 22 months.
Mall, now the Superintendent of Police in Sabarkantha district, was the 187th witness to depose. The trial started in 2009.
It was Mall, the then Deputy SP with SIT, who had arrested Kodnani in 2009. Kodnani has been sentenced to a 28-year jail term in the Naroda Patiya riot case.