this case is very interesting as it seems Wint (and others) had all the luck with them that day, the money was delivered without anybody thinking this is very strange and calling LE, they left no forensics except for the pizza and on the jacket, probably wore gloves, nobody checked out the alarm trip, the husband of the staff member thought something was wrong but did not press the issue till it was too late, they were able to remain in the home for an extended period of time - possibly up to 18-20 hours, this needed more than one person as they would have needed to sleep in shifts, staying awake for that length of time with a belly full of carbs and keeping under control 3 adults in one room and the child in another would have been near impossible
they all would have needed to go to the toilet, the perps had to go to the toilet at some point during the time they were in house, with only one perp it would have been very risky even taking a quick bathroom break, or going downstairs and collecting the pizza, somebody had to bring in the pizza, if they sent the maid or a family member down they could have made a run for it, if the perp/s went then one or more had to remain upstairs to guard the victims,
the perps had no idea how compliant the family and staff would be, during a very similar crime involving the Petit family 2 men were involved, and they tied the victims to their beds, twice a 15 year old girl worked herself free from her restraints and tried to call 911 one time, and tried to get out of the house, it takes eyes on the victims at all times to make sure they are not wriggling out of their restraints and gaining access to a phone/panic button the perps do not know of,
it will be interesting to see if LE ever make any further arrests