Then the obvious explanation isn't that 'Mez must have been murdered as soon as she turned the corner' (she didn't get home until circa 9:05).
If she was apprehended, it would have been Amanda and Rudy lying in wait for her.
CCTV shows someone, presumed to be Meredith, approaching the cottage at 20:41. Since the CCTV system was proven to be 10-12 minutes slow, the physical evidence indicates Meredith arrived home sometime between 20:51 and 20:53. This coincides perfectly with Meredith calling her mother shortly after she gets inside and locks the door, at 20:56, only to have the call get disconnected when Guede attacks her. This is further supported by the fact that the initial assault happened while she was still wearing the jacket she walked home in.
Conversely, you once again resort to lying, presumption and speculation;
(1) That she's walking home with a cell phone pressed to her ear but not connected to anything.
(2) That Meredith couldn't have called her mother that evening because she had spoken to her mother earlier in the day.
(3) That she arrives home at 21:05 when the physical evidence says otherwise (not only the CCTV, but they left Amy and Robyn's place at 20:45 (estimated by Sophie in her testimony) and it's less than a 15 minute walk). Your "circa 9:05" claim is pure nonsense, supported by absolutely nothing.
(4) That Amanda is lying in wait for Meredith even though Amanda had no idea when - or if - Meredith would be returning home that evening.
(5) That Popovic spoke with Amanda at Raffaele's apartment at about the time Meredith and Sophie are leaving Amy and Robyn's place, that Amelie didn't end until 21:10 - and yet you claim Amanda was lying in wait for her at the cottage before 21:00.
(6) Lying in wait means to hide in preparation to surprise attack someone. But you've often said this was not premeditated, that it was an argument that escalated. So which is it? Oh wait, I know... you are about to redefine what "lying in wait" means.
So once again we have a situation where you close your eyes to evidence, you make things up, you completely abandon any effort at critical thought and as a result you jump to yet another baseless conclusion. Perfect.