Who should be liable/responsible in a situation like this?

When I was younger my dad's boss had something against him and he had one of the other workers trespass into our yard and I don't know, spy on my dad or on our house. My dad ended up contacting the police and one of the officers wrote a letter to the company informing him that if this happened again it would be grounds for an arrest. Eventually my dad and the other worker ended up reconciling and the boss moved to a different company.

So if a boss orders one employee to trespass onto another worker's home, who is it that should be arrested/sued? If the worker suffers (for instance gets arrested) can he also (in addition to the victim) have recourse against the boss?