All 50 states have safe haven laws. However, because each state has their own, it can be confusing as to what the procedure is for each state. In some areas, you can drop a baby off with practically any person in a uniform (police, firefighter, doctor, hospital staff, social worker). In some areas you have to state your intent (I'm surrendering this child under Safe Haven) and in some areas, you merely have to hand them over and walk away. Some states make sure that their Havens are marked with big Day Glo colored signs and iin some states, you have to Google your fingers off to find your nearest haven. We need a cohesive system that works the same way everywhere. JMO.
In this case, I don't buy that she wasn't aware of safe haven, and even if she wasn't aware, she had nearly the whole pregnancy to figure something out. There is nothing to suggest that that she looked into adoption, which she surely had to know about, or abortion, which she would have had time to do, if she knew about the pregnancy from the beginning. Google any set of words related to "pregnant" and "don't want the baby" and you will get information on safe haven laws...she just wanted these children to die, there were options, she just didn't care to explore them because it would have cost her money and the babies would have stayed alive, which went against her plans.