Before a transgender New York Times games engineer was fatally shot, he was engaged in a bitter custody battle with his estranged wife, court records show. His in-laws have been taken into custody.

Police in Dublin, California, arrested Shouyong Zhang and Shili Chen on suspicion of murder and conspiracy to commit a crime following the Saturday death of Jonathan McKinsey, according to the San Francisco Chronicle. Witnesses told CBS News that the couple, McKinsey’s in-laws, took turns shooting him Saturday in the parking lot of Dublin Sports Grounds. Police have not publicly established a motive.