I feel there a couple of major points here.one,yes,it appears its someone who is familiar with the 4crime scenes.I feel like this revolves around Hanna may rhoden.she had a boyfriend,CH.not sure I he was the father of the baby,according to her fb,they started a relationship after she was pregnant.it appears they lived together,but why wasn't he killed along with her?she stated in 2013 she married JW,although it wasn't a,legal marriage.i think its significant that she was killed after giving birth days before.the fact that none if the babies or child harmed physically,makes me feel it was someone who had feelings towards the kids.is it poss that she broke up with a bf or perhaps the baby's father felt alienated after birth of baby ,and her father backed her.ir wouldn't be the first time people were murdered for interfering .JUST MY OPINION