Norman Moore, his son Devonte and an unnamed 16-year-old set out to kill a gun-toting rival -- but executed an innocent man, prosecutors said.

Pei Chung, 34, posted fresh food shots from Sea Thai and the trendy Italian restaurant Misi on Saturday and Sunday.

The 56-year-old victim stepped into the fray when she spotted two men fighting on the southbound No. 2 and 3 train platform around 12:40 a.m., law-enforcement sources said.

The body of the victim was discovered around 7:45 a.m. Sunday at Broome and Columbia streets, steps from Luther Gulick Park in Manhattan and near the Williamsburg Bridge, authorities and law-enforcement sources said.