Wow. I have taken mine in for these kinds of injuries and never had this happen in. Now, that could be because they could see they had no healing injuries, or that they just don't do this. Or maybe they do with random people. But I've lived in Richardson, Garland, Plano and was never met with a social worker. (I have boys, so we've frequented lol.)
I was told later it was probably because 3-4 yr olds rarely have broken arms. Their bones can bend a lot. But it sometimes take force to make that happen so it is a red flag. Since his was broken they wanted to check out the circumstances.
But it was a 'special circumstance' that created a perfect storm. Son and his friend went to a birthday party at a kid's gym and spent hours on a huge trampoline that covered the entire floor. They learned to do FLIPS.
And they ate a lot of sugar, and were exhausted when we got home. I tried to get them to calm down and relax, and sat them on the living room couch, to watch a video.
When I went to the kitchen, they started jumping on the couch, and according to my high spirited son, 'he forgot' it wasn't a trampoline. LOL He tried to do a flip and landed right on top of the coffee table with his arm pinned under his body. He seriously thought he was back in the gym on the cool trampoline. He told this to the social worker and cracked her up.