For most of the movie, we’re led to believe a man has kidnapped and harmed his family. A woman later hits her partner with a brick. None of this is on screen.
Nothing shown but it is very graphically described in different ways. You never get a clear idea of exactly how this certain person hurt the baby, but it was described as being very bloody. Also the young girl was left home alone and she is very scared and crying.
***SPOILERS***
Emily is revealed to have hallucinated snakes in her baby's stomach and that she "took them out." She also hits her ex-husband in the head with a brick at the main character, Joe's, prompting.
**spoilers!!** Depending on your interpretation of the story, yes. The main character get sentenced to something unknown and won't see his kid for a long time. But some might say because he deserved it.
Joe urges Emily to pull the van's emergency brake while the vehicle is in motion - the call ends just as the brake screeching is heard. Nobody is injured.