Recently the teacher has noticed that DS has been lying about a few things and when questioned he says I don't know or I forgot or it wasn't me type answer. At home he has been quick to deny any involvement in any incident that flares up between him and DS2. The teachers and I have a reminded him to tell the truth and be honest.
Last week I left a battery out on the side and 10mins later it went missing. DS said he didn't take it and didn't know here it was, as we were about to go to school I had to leave the conversation with if you find it then please return it.
He has a special box in his room so while he was in the bath tonight I looked in it and found the said battery, I'm fuming. I didn't say anything to him about it and I didn't want to upset him before bed. I'm really upset that he has lied to me despite us talking about the importance of not lying.
I don't know who to get through to him, fed up. What would you do?