Did the killer trick his way into the flat? Or was he invited in?
And did he start the fires before or after the murder?
With an external security door, her flat door with an internal chain latch, and a peep hole in the door to see anyone outside, and no signs of forced entry, it would be virtually certain that Joy willingly let the killer into her flat.
A killer wouldn't have picked a random victim who happened to live up on a 6th floor flat.
Joy let her killer in, and did so willingly whilst wearing her nightdress; ergo, she was comfortable enough to not feel the need to get changed into some clothes.
In terms of the fires; the 999 call was made at 23.18pm. The actual FULL length 999 call is much longer than what was released to the mainstream media, and in the full version, the black male making the call spends approximately 3 minutes on the phone. This version makes it seem less likely that he was the killer.
However, as has already been highlighted, the caller knew the name of the flats; St David's Court, and yet couldn't name any of the streets without assistance. This suggests he knew the building, but didn't know the area; at least not at face value.
Note that the 999 call was made at 23.18pm.
The unidentified male seen on CCTV at 22.31pm, is almost certainly the real killer.
Considering that the man who made the 999 call was a black male, and the man caught on CCTV was a white male, it confirms that unless the man who made the call was an accomplice, then he was an innocent party who just happened to spot a fire up on a 6th floor flat as he drove past.
While that may seem like an unlikely scenario, it's possible that the man was travelling east along Forest road and just after he past the flats, he then had to stop his car briefly at the traffic lights at the junction with Forest Road and Fulbourne Road/ Wood Street. If the lights were indeed red, he then had some time (between 30 to 45 seconds) to look to his right and glance up to see the flames at the 6th floor window.
The phone box from which he then makes a 999 call, was located to the driver's left (on Fulbourne Road) i.e. the opposite direction to the location of the flats.
It's most likely that he was driving east, because the name of the flats "St David's Court" was written on the building facing Forest Road. In other words, for him to have known the name of the flats, and not know the road names, then the man had to have driven past the front of the flats in order to have seen the name "St David's Court."
The name of the flats is not visible from the man's line of sight from the phone box, so that when he makes the 999 call, he can't see the name of the flats from his position in the phone box.
Also important to note that Joy's flat windows were closed, hence why the 999 caller says he sees "FLAMES" and not "Smoke."
If there was any smoke seen, then more people would have called 999.
Note that there is no evidence to support the idea that the man who made the 999 call was anywhere near the flats at the time of the murder, but at the same time, he had to have known the name of the flats before he made the 999 call.
If the man calls in at 23.18pm, then the fire must have been alight by 23.15pm. This is because it would have taken the man a few minutes to park his car, walk to the phone box on Fulbourne Rd, and then make the call to emergency services.
And considering that the entire flat wasn't gutted out, then the fire had to have been started very close to 23.15pm.
The fire service didn't get into the flat until around 23.30pm, and it's practically impossible for multiple flat fires to have burned for too long before the entire flat is engulfed. But this wasn't the case.
If coffee cups, paperwork and a plant can all be among the items to not be incinerated, then the fire had to have been started not long before 23.15pm.
Based on the man caught on CCTV having been the killer; he reaches Joy's flat at 22.34pm, and has the time to share a coffee with his victim before killing her. To make a coffee, let it cool and then drink it, would take around 15 to 20 minutes.
It suggests that the murder happened sometime just before 23.00pm, possibly 22.55pm. An impulse killer wouldn't normally spend more than a few minutes with a victim, and so the because the timing of the fires seem to suggest that there was a time period between the murder and the fires being started, it implies that the killer knew he wouldn't be disturbed and therefore wasn't in a particular hurry in that sense. It seems the killer spends around 10 to 15 minutes with Joy, and then deliberately starts the fires around 23.10pm just before he leaves and exits via the rear door of the flats which runs out into the quiet side road, and conveniently had no operational CCTV cameras.
If the fires were started at 23.10pm, and the fire crew enter the property around 23.30pm, is means that the fire had been alight for around 20 minutes.
But if the fires were started any earlier, then why wasn't the entire flat engulfed and destroyed by fire?
Lots to ponder.