At the time of Nicole's disappearance, these apartments were considered very safe. There was a pool behind the building, and all tenants could use a key to access the pool.
There was a buzz system in order to get past the lobby to the apartment units.
Someone would have had to let the perp in through the main lobby door, side door on the first 1-2 floors (you can see there are no stairs going the length of the building).
At that time, you needed a key to get into the parking garage. (This key cannot be copied) It is easy enough to follow someone in.
There was no video surveillance of this building. It is set back in the green a bit. I lived in an identical (same builders and layout) apartment complex on Dixie in Mississauga. It has outside and underground parking.
This girl was stalked. I have no doubt she was watched swimming before (there was just a metal fence around the pool), and the perp figured out where she lived. This could be as easy as the her picking up her mail, as the mail box generally followed your unit number. (We lived in 1205 and that was our mailbox as well). I think she got into the elevator, he got in, took her to the garage, and out from there. You don't need a key to get out of the parking garage, just in. He could have followed someone in from there.
I really think this perp was there when she picked up the mail.
The parking garage doors were notorious for being left open, being jimmied, whatever. People would take one of the parts out so that it would stay open. Ours was broken a lot, often in the summer. Another reason being the hot humid summers in Toronto would make the floors really mucky and gross. Keeping the door open would air it out, since the ventilation in the parking garage was poor.
Also, within the basement level of this building were storage lockers, a recreation room, cable room, many utility rooms, electrical rooms, the chute (garbage), and laundry.
The chute would have been too small to put her in, and all of the rest of the rooms require key access, except the laundry room, where they keep it open between general day hours.