Baby Found In The Garbage

I was watching the news last night and was then again shocked having heard that there's a a 2-week old baby found in a pile of garbage somewhere in the Western Suburb of Chicago. The baby was wrapped in a blanket and sitting in a car seat. My goodness, thankfully it is not very cold yet and the baby is fine. I just don't understand it, why do they have to leave the baby in the garbage... I believe that here in Illinois (not sure about the other states), if you wanna give up your baby, all you have to do is to leave them either in a hospital, police or fire station with no question ask. Why in the pile of garbage? :(