Sending Carbon Copy (CC) while update case

I want to send carbon copy to user one every case update but by default it is not sending email to more than one user.
How can I do it ?

Because of this

… i think it will send to all Contacts linked to the Case. So you can make sure your CC contact is linked to every case (use a Workflow to automate this if necessary).

Or you can just tweak the function that uses that:

Note that there are other functions in that file that send emails (for case creation and case closure).