I understand it's July 4th weekend and Jose is being patriotic with his red-and-blue tie and blue handkerchief, but shouldn't he wear something more somber?
he is saying car didn't smell to her friends. lies surrounding gas can. ga took too long to pick up car. knew car was out of gas.
ga knew car was at amscot for three days. knew it was out of gas. showed up to get car with his key and a gas can.
smelled the smell of death. did nothing, went to...
Yes, that something-not-wrong, something-not-right is Casey's personality, dude. That's it. It doesn't matter whether she was abused. There's something wrong with her, and she murdered her daughter.