What is the active voice sentence of the following sentence?

Question

The two men were handcuffed together.

(situation: The police officer handcuffed his left hand with the right hand of the criminal.)

Answer 1

Your sentence is fine, with a one-word correction:
The police officer handcuffed his left hand to the right hand of the criminal.

or something like this:

The police officer handcuffed himself to the criminal.