Gaffney recklessly caused the death of Francis Victoria Garcia, who was with him in the back seat of a auto parked on the top level of a garage at 140 Prospect Avenue before dawn Saturday, Bergen County Prosecutor Mark Musella said.
An autopsy determined that Garcia's death was caused by compression injuries to her neck.
The lady had gone to a boisterous, unruly Halloween party on the fourteenth floor on Friday night, a neighbor who asked not to be named revealed to The Post.
City police got a 911 call at 2:14 a.m., Musella said.
Gaffney is said to have told police he and Garcia were having sex when she lost consciousness.
Gaffney, additionally of Maywood and jobless, was accused of wild homicide later Saturday, Bergen County Prosecutor Mark Musella said in an announcement.
The caller directed police to a detached parking garage at 140 Prospect Ave., a luxury high-rise apartment complex.
The 5-foot-8-inch, 180-pound Gaffney told detectives that they'd taken prescription medication and were having rough sex in her auto when she lost consciousness, a law enforcement source said.
The party was so loud that the doorman was summoned at one point, the neighbor said.
A law enforcement source told the Daily Voice that Garcia had bruises on her neck consistent with Gaffney's claim.
Emergency services were called at around 2.14am on Friday and Francis was taken to hospital where she was pronounced dead.
Gaffney told detectives they took prescription medication and had rough sex in Garcia's auto when she lost consciousness, a law enforcement source told the outlet.
It was not immediately clear whether Gaffney knew Francis previously or if they'd just met at the party.
Gaffney told cops that he and the woman had consumed prescription medication, according to the site.
Gaffney was being held at the Bergen County Jail without bond.