SNIPPED: "...Another option is that she could set her cellular up to ring to her home phone extension if she received a call that went to voicemail. So she calls voicemail, gets the home phone to ring, and has "proof" that her job called her that morning...."
We know that there was one call placed from the Anthohny home phone to Casey's cell number at around 7:45 a.m. on June 16. Are you saying Casey could have called her cell from the home phone, after programming her cell to ring the home extension of she received a call that went to voicemail, which call then rang the home phone?
I'm wondering how the home phone could ring if that's the phone she used to call her cell??? Or is there enough of a delay that she could call herself from the home phone, let the call ring just until her cell's voice mail picked up, and then hung up the home phone wuickly enough that the home phone could then ring as the cell called her home extension?