A grand jury has indicted a 37-year-old cryptocurrency investor accused of kidnapping a business partner in Manhattan's upscale Soho neighborhood for three weeks, shocking him with electric wires, and dangling him over a staircase to try to get him to give up his Bitcoin password,

Officials said they found evidence of the alleged torture inside an upscale New York City apartment, including photos and a saw.

A second suspect surrendered to police Tuesday morning in the harrowing case of a cryptocurrency trader who was allegedly kidnapped, tortured and held hostage in a Manhattan apartment for several weeks.