He might have got mixed up with some very shady characters, maybe even owed them money. The Russian mafia comes to mind too.
Possibly, but that husband is sure acting strangely for one who just lost his wife and baby. WHO could murder a little baby like that? It's not as though that child could have ever id'ed the killer--this looks much more like a man who wanted no part of a wife and child. Sort of like Scott Peterson.