Need help with evicting truck parked on property

[Carlos Lez]

Dear members

As a gesture of goodwill I allowed one handyman to park his truck on a corner of my rental property premise for a short duration. During this period he has hooked up an extension to draw power from the house and used the water. He had also found a buddy and they work together fixing blenders (basically operating an unlicensed shop). I have politely asked him to move but he gives the phone to his buddy who says he will talk to a lawyer because I am harassing them! 
I’d appreciate any constructive suggestions on where to begin the process of getting them out. Please note that they are illegal immigrants here in San Jose. Further, San Jise is a sanctuary city so I don’t know what protection they have. They don’t pay me anything and I don’t have any lease it contract.