25 years...
For entry....someone known (family, friend) OR someone "official" (police officer, gas man, electric company).
I've read he used the ruse that Cinnamon was outside and brought to door but that's a pretty specific unfolding of events for an unplanned event.
If he broke the glass globe to attract their attention, I'd imagine they'd be even more cautious checking it out in the middle of the night (as opposed to throwing the door wide open to see what happened.)
The theory that Stacy struggled on the way out raises a flag. Why just her, was it her nature, or did the other women know the abductor and she didn't so she panicked more quickly? The fact that the DNA on glass shards is so murky seems like that is the key.
I've also wondered why the "don't do anything stupid" van witness has been mostly discounted? Is that not a completely bizarre scenario that would have been followed up regardless of a triple abduction?
The "porch lady" received a lot of publicity but from what is known, it isn't supported by the time line. But beyond that she waited, I believe, some two weeks before coming forth.
In 1992, I received a telephone call at my home from a lady, now deceased, who was somewhat close to the family. She stated that she was in the company of the "porch lady" and the officer who were present while a hypnotic session was being conducted. However when it came to getting to the core of what she knew, she became "hysterical" and the session cut short, as told to me.
The van, or a replica, of the van was displayed for about four months on the lawn on a busy freeway where people could go see it. We don't know if a van was actually used (some believe not), or anything else about it had any value. But at the time that was best information the police evidently had. A more likely account is the van, similar, that was stated to be parked on the corner of Delmar and Kentwood, just west of the main drag (Glenstone) and seen by the paper carrier (or "yard sale lady") at or about 3:30 AM. That tends to support the van sighting. And it might be the reason the "porch lady" was given credence. As the now deceased lady told me, her account was based on the business the "porch lady" and her husband had where they dealt in used vehicles and she could recognize the make and model of various vehicles. It is not impossible that her account is in fact what happened but I don't know how the time line would fit since my recollection she saw it sometime between 6 AM and 6:30 AM (I stand to be corrected) which would have been long after the expected exit of the perpetrators. One detective who looked into it was said to be skeptical as it just didn't ring true although there is no indication the porch lady just concocted the story. We just don't know.
The only two theories that make any sense to me is a close acquaintance who was known and trusted or a police officer or a fake police officer. At that time of the morning most people would never allow someone into their home unless they had no reason to fear for their safety. The gas leak sounds very unlikely to my way of thinking.
Sorry to be so long but I wanted to recount what was personally told me.