How to deal with mice without the use of lethal force?

This little buggers have infested by attic, please help!

Get a cat it does the dirty work for you.

If you goggle non lethal mouse traps you will get a lot of home made and commercial options.

put out some chocolate on a plate, mice can't digest it and will die. Carbonated liquids will also kill them, as they cannot burp, so the carbonation will destroy their intestines.

Thanks, found one!

This worked for me

Are you secretly Darth Vader?

Because giving up nice chocolate and soda/pop to kill rodents seems evil and requires dedication and self control...

yes. Although I go by Anakin nowadays since my death at the hands of my former master.

You could try getting some cotton balls and then soak them in 100% pure peppermint oil.  then place the cotton balls in areas where mice are likely to enter, along the sides of the walls where you think they run or see their droppings.