The other issue is the timeline. According to most sources PH returned to the office after popping home for lunch around 2pm. We know Ann was alive at 2.30 as at this time she spoke on the phone to a friend. At 3.30 she was apparently sighted by someone else, who was passing the Herons’ home on a bus, but this obviously couldn’t be confirmed in the same way that the phone call was.
In a letter to police by PH published by the Echo in 2015 PH set out his movements that afternoon:
At about 3pm I received a telephone call from a client, Cleveland Bridge, who asked me to attend his office to discuss a contract my company was tendering for. As requested by him, I left the office shortly after 3pm and made the short journey to Cleveland Bridge and was in front of the client and two of his colleagues by about 3.15pm. I left the meeting at about 4.30pm and returned to the office via Croft and through Middleton St George village arriving back in the office at 5pm, returning home at 6pm to find Ann dead on our living room floor. Each and every step of my movements as I’ve described are corroborated by witness statements in Durham Constabulary’s own prosecution bundle of ‘evidence’ presented to my solicitor.
The drive from Cleveland Bridge to the office should’ve taken 5-10 minutes, so if PH had left at 4.30 he should’ve been back in the office at 4.40. Instead he says he took a more circuitous route back through Croft, which would’ve taken around 25 minutes, hence his return to the office around 5pm.
The gap in the timeline only occurs if he didn’t take this circuitous route - there’s probably a 15 minute window in which he could’ve stopped off at Aeolian House, killed Ann, then left again, which I think is doable.
Presumably his movements in and out of the office and at Cleveland Bridge could be verified, through CCTV, visitor logs, minutes of the meeting, stuff like that. Corroborating his movements between 4.30 and 5 is, I guess, where the ‘gap’ materialises. If he was sighted by a witness in Croft, for instance, then could that witness be wrong? Maybe they saw him on another day? Maybe it wasn’t actually PH that they saw? And so on. But PH and his family, and JJ, seem confident that the corroborating evidence is solid. Without having access to the ‘receipts’ it’s difficult to make a judgement. It would’ve been interesting to see this part of the case tested in court.
Source for PH’s letter:
I am innocent, it's time to clear my name - Peter Heron's letter to Durham police chief