R.H.
I don't know if this will help -- but can't hurt. Two things: first when I was a child I did constant "white lies" ...just enough of lying to get me out of trouble. I didn't want my parent to yell at me -- so it was a way of skirting around the issue. My parent didn't yell at me and I didn't get in trouble. Problem solved. Because if I told the truth, I would STILL get yelled at. That was the reason I did it. I did this until I realized that it was alot harder to try to remember the lies -- much simpler to tell the truth. And that people are much more forgiving if you simply tell the truth and learn from the mistake. I learned that on my own -- so it could be a phase he is just going thru.
Second: I use to teach Army kids on base -- 4th grade. I found that when they would "lie" it was sometimes also a way to get my attention. The first year I taught most of the parents (mostly Dads) were away on reforger in Germany for the entire year. I found as the year went by without the parent, the more white lies and more clinging to me they got. Wanting the attention and missed affection of the missing parent in the armed forces. I wanted this to change, so I really made it clear my second year of teaching that I wanted the kids to know telling the truth was a good thing. So this is the speech I would give them the FIRST day of classes.
"I want you to always tell me the truth, even if you have done something wrong. I promise you, I will NOT yell at you for telling me the truth...why would I yell at you for telling me the truth? It's if I find out you have lied to me that I will be mad. So always tell the truth."
I found they all took me for my word...and didn't lie to me. Now, I had to really practice what I preached and had to bite my tongue when I questioned a child about what they may have done wrong and they admitted to it. I really had to take a breath and then say calmly "thank you for telling me the truth - even if it meant you were wrong. I really appreciate that. That's a very grown-up thing to do. Now how can we make what you did that was wrong, right again." Then we came up with a plan that they would execute to resolve and make it right again. Make it a positive thing.
In other words, I had to train them to know that the truth mattered. And I had to train myself not to yell at them. So my ultimate suggestion is make the effort to teach him that the truth is the only way to go.