43-year-old Piotr Seweryn was found dead inside his basement by his wife around 1:05 p.m. on Wednesday.
The cause of death has not yet been released, although police say they are investigating the death as a homicide.
The incident is under investigation by the Yorktown Police Detective Division along with assistance from the Westchester County Crime Scene Unit.
The last homicide in Yorktown was 20 years ago.
