[TexKat]

I don't know if Greta's interview has anything to do with the arrest. Greta thinks so, therefore I tend to believe Greta at this point.

There could have been something about that/those phone calls Paulus was taken while Greta was there in the home. Something about the phone calls and the presence of Greta possibly could have put Paulus in the very uncomfortable, sweaty, handwringing mood.

[maggief]

He could be overheard talking on the phone. It wouldn't take much to decipher that conversation, if the lines are tapped.