1. Considering Joe died, how do the police know he killed Pauline ? Because of Dot's word ?

Dot rang the police and Joe threw the phone on the bed. It stilled dialled and the police heard it it.

2. Joe falls out the window and within 2 days it is considered accidental death, why ? What proof ? I bet there is a gang of pensioners out there waiting to commit murder as it seems being old means you are innocent.

Again the police would have heard Joe attack Dot and Jim come in.

3. So the police don't even consider or assume that maybe Dot or Jim murdered Joe to free their grandaughter (if that is what Sonia is) from jail ?

Read above....

4. Where is Joe's long term mate Bert in all this ?

Bit dissapointed in this that Bert hasn't been seen mourning Joe.

Seeing as most of this was skipped in a missing few day's no one know's. At a guess the confession was heard by phone....and having had weeks of Paulines death that's fine with me. Glad to see it all gone.