Nicky Costas, Jr. was one of two kidnappers along with his cousin Roy Barkin. Marty Dressler hired the two to target Alana and Katie Conlan to extort John Conlan for $15 million. They killed the housekeeper Isabel Paez, then Alana.
Nicky tried to escape when snatching the ransom at the drop point. Nicky rode on his bike into a cable plugged into a bodega by the owner, cracking his head on the pavement and dying on impact. Barkin and Dressler were arrested and imprisoned in the wake of the crisis. (L&O: "Darkness")