NYC police are investigating a woman's horrifying discovery. She found her friends dead with their necks slashed in their Brooklyn home.

A father and daughter were found dead with their necks slashed inside a Brooklyn home over the weekend, law enforcement sources say. The 91-year-old man and 66-year-old woman were discovered on the kitchen floor of the family home in Cypress Hills on Sunday afternoon,

The victims, a 91-year-old man and a 66-year-old woman, were discovered brutally killed inside a two-story home at 186 Warwick St. in Cypress Hills at around 4:30 p.m. Sunday.

An elderly man and woman were found dead Sunday — both slashed in the neck inside a Brooklyn apartment, cops said. Police responded to a 911 call around 4:30 p.m., finding Roosevelt Simmons, 91,

A man and a woman were found stabbed to death in an apartment in Cypress Hills Sunday afternoon, according to the NYPD. Police received a 911 call at around 4:30 p.m. and responded to 186 Warwick Street.

A man is being questioned in the brutal Brooklyn stabbing deaths of his girlfriend and a 91-year-old man — after telling the woman who found the bodies, “You know what happened,” a police source said Monday.

A suspect was arrested Monday in the brutal Brooklyn stabbing deaths of his girlfriend and her 91-year-old stepfather — after telling the woman who found the bodies, “You know what happened,” a police source said.