So firstly the guy should never have been walking free to have been able allegedly have kidnapped the girl. If you’ve got a history of this sort of thing even going to the extent of recording the crimes you are not fit to mingle with other humans.
Secondly until we know otherwise these are just allegations and so far trial by media. Let them do their jobs first and wait for the man to actually be convicted.
Last but not least wtf were they doing leaving their children unattended, even leaving the door unlocked and slightly ajar, then doing the most incompetent series of kid patrols known to parenting. That is behaviour not fitting of their respective positions in society. Neglect at best dodgy quite possibly.