[serious] Husbands who had another man's kid pop out in the delivery room, what happened?

My wife already had 3 kids when we got married. A 1 year old, 7 year old and 9 year old. Going in I knew it was going to be rough. Boy was it rough. Turns out the bio-dad of the older two is a vile, malicious, sickening individual. I struggle to call him a person... I didn't go in thinking he was as bad as I heard, I tried to befriend him at first. 6 years later I'm thinking I should've just gone with murder. The older two were molested by him for years. My stomach churns just typing that. This "learned behavior" was practiced on the youngest of the 3 by the middle one. When shit hit the fan the middle one ran away to his bio-dad and claimed abuse by me and the oldest. And that the abuse youngest suffered was from the oldest. After over a year of courts, counseling, and life changing moments, oldest is clear of everything. Me and my wife are cleared. Subhuman ex husband is also clear... no files charged. CPS says they can't do anything, Sheriff can't do anything. The most sickening part is that this wasn't his first time being accused.

/r/AskReddit Thread