BBM ...
Maybe something happened and Jonathan got scared, grabbed the cordless phone and ran to another neighbor's apartment? Then, because he had been running, he was out of breath. He called Mom, but because he was running, he was out of breath and the neighbor said - Jonathan, give me the phone. So Angela answers, neighbor asks JP if his mom's name is Angela because she's not familiar with her, he says yes, and whomever he was running from breaks into the house and grabs the phone and turns it off?
Just pure speculation. I read too much Nora Roberts ...... :innocent: