Cosmo DiNardo made the admission to police last July, when he told authorities where he buried the bodies of 19-year-olds Dean Finocchiaro and Jimi Taro Patrick, 22-year-old Mark Sturgis, and 21-year-old Tom Meo in a bid to avoid the death penalty.
DiNardo's cousin, 21-year-old Sean Kratz, was charged in three of the deaths but rejected a plea deal on Wednesday.
Prosecutors said they will seek the death penalty at Kratz's upcoming trial.
I can't feel my legs,'" DiNardo said regarding the last moments of Tom Meo's life.
DiNardo then detailed to police how many times he shot Mark Sturgis, who was attempting to run after Meo was hit by gunfire.