This working is done when you need to look at a broader picture and see who is in the wrong and who is in the right. Sometimes its difficult for us to decide for our selves of what is right and wrong. But petitioning a higher force such as God or any deity you may want to call upon for this spell will give you great details on such topic. I personally prefer to use a psalm from the bible because that how I do things, but feel free to add your own prayer.
Disclaimer: Please always remember to cleanse and consecrate your candles before doing this spell, thank you ~ *
Inscribe the names of the two suspects on two different white candles.
Light both candles and recite psalm 1.
Determine the answer through reading how they burned.
Remember to use your intuition when it comes to this. These examples can be combined and should be read by how you feel of what they could mean. If you feel you don't want to use my examples that's fine, just use your intuition or your own made ones.