I mean, without any suspicions, police will ask everyone who recently saw the victim of a violent crime like this. Also the baby must have been registered at birth, so police knew there is a baby missing. At this point it is like a two peace puzzle.

Unfortunately it is not the only dumb murder plot i have read about in the news over time. I remember one case form like a decade ago, where some guy and his mother tried an insurance fraud with murdering the girlfriend/wive of the guy. So the murderers made multiple life insurance contracts with different agencies and murdered her a few months later.

If these kind of people had 5 brain cells more, they might see how retarded their plans are and not murder someone over it.