New York Penal Law Section 215.13 - Tampering with a witness in the first degree.

215.13 Tampering with a witness in the first degree.
A  person  is  guilty  of tampering with a witness in the first degree
  when:
1. He intentionally causes serious physical injury to a person for the
  purpose of obstructing, delaying, preventing or impeding the  giving  of
  testimony  in  a criminal proceeding by such person or another person or
  for the purpose of compelling such person or  another  person  to  swear
  falsely; or
2.  He  intentionally  causes  serious  physical injury to a person on
  account of such person or another person having testified in a  criminal
  proceeding.
Tampering with a witness in the first degree is a class B felony.

Last modified: February 3, 2019