The shows did not offer anything new. Still speculation. Still unsolved.
My personal opinion is that she was abducted.
The parents were negligent, and in that respect are not absolved. After trying so hard to BECOME parents, they leave her and the twins in an UN-LOCKED room in a HOTEL occupied by STRANGERS.
The 'Duh' factor here is huge, and I'm not saying that because I've been a 'perfect' parent. When my kids were little, they 'wandered off' from time to time (the little buggers are FAST)...but leave them in a hotel room alone, at night, surrounded by strangers, and in a FOREIGN COUNTRY no less??? :doh:
I pray little Maddy is still alive, and I pray for her parents.