They provide too much information
While it may seem like the more details you get about someone’s activities, the more likely you will believe them. But, it is more likely that, the reason they have provided so many details, is because they have anticipated any and all questions you might ask and are trying to cover up their lies.
This is because the more someone has to hide, or wants to hide something, the more thought they will put into what they will say if asked about their activities and are willing to go the extra mile to make sure they are.
But, while the devil may be in the detail, sometimes the best lies are the simplest and don’t really require that much detail.
So, no matter whom you suspect of lying or what they are lying about, some other things to look out for are when the details are ruining the lie and when the details actually check out.