My last response just got lost in cyberspace.
I get concerned too when my kids won't tell me something for whatever reason. So, I can understand where you are coming from.
Have you tried throwing a little humor into the discussion? Even with a little humor my stubborn boy, Cha cha will usually fess up. I imagine our conversation would go like this, "So, tell me again how your finger got hurt? Did you say a fierce dragon attacked you? No? Oh, maybe it was that big alligator that bit you? Well, whatever it was, it looks better. Or, do you think we need to buy you a new finger at Target today?" By that point, Cha Cha is usually giggling and going, " NO MOM!" and then he tells me what happened.
Just a different tactic to try and one that works sometimes around here.
" I object to violence because when it appears to do good, the good is only temporary; the evil it does is permanent." Mahatma Gandhi
"This is the ultimate weakness of violence: It multiplies evil and violence in the universe. It doesn't solve any problems." Martin Luther King, Jr.