Have You Ever Thought Someone Was Lying To You And In Fact They Weren't?

The closest I come to this question is just the other day, Christmas early morning at my friends house. Ive been staying here for a little while and he doesnt like it (Ill be leaving soon hopefully) but I am good friends with his brother who is also here. Well, the other night/early morning, the one I dont get along with decided to mess with me and play mind games, probably with the intention of telling me to get out. What he did was, after I had went to sleep, he came downstairs where I was to get some food. He went back upstairs, no biggy, right? Wrong. I had woke up a couple hours later, only to find the phone off the charger. I rely on that phone to communicate with my b/f whos going through a lot right now, so when the jerk took the phone off the charger, I was p/o'd. I was waiting for my b/f to call me back and didnt know when that would be. He took it upon himself to take the phone upstairs and hide it. Well, when I woke up and saw it missing, I went upstairs (this was at 2am mind you), asked my one friend if he took it, he said no. I went to the jerk, asked him if he took it, he said no. I immediately accused him of lying, 1) cause he always does, dont know why and 2) cause I know he took it. He was the only one who came downstairs that night/early morning and I knew it was him cause of how he sounds coming down the stairs. So in this case, he wasnt necessarily lying per say, but going around the truth. My question was if he had the phone. Technically, he didnt have it on him, but he did take it, hidding it upstairs on the towel rack, going around the truth.

My son's father is one of those people that lies more often than he tells the truth, so there are a few times that I thought he was lying about something when really he was not. I find with him it is easier to assume he is lying until I find out otherwise.