It just ended airing here.
Anne Bird has a strong feeling that Laci (and Connor) were drowned in the backyard pool.
Laci told her a month before that she liked to float in the pool very often as it eased the discomfort of her pregnancy at that stage.
Jackie comes off as a real piece of work. Jealous of Scott and Laci living closer to the Rochas. She tells Anne at that same month time period that Scott and Laci are having problems and in answer to Anne's "what?" says "men", projecting Scott's adultery onto Laci (though Anne didn't know what to make of it at that time and didn't explicitly say my last part about Jackie projecting).