In all cases, be your child's advocate and encourager, letting him know you will always be there to protect him and to remind him that his trust in you and your trust in him is what really matters.
Remember, too, that lies told in haste (speaking before thinking) are usually simple, silly things that really aren’t worth lying about.
When this happens, don’t dwell on it — let it go and simply reinforce the positive aspects of telling the truth, reminding your child that yours is a home where only the truth is acceptable.