My theory:
DB called Jersey via Megan's phone either to a) purchase drugs or b) because she was transferring data from her husband's phone and was curious who this "Megan" was in his phone book. As DB's phone was brand new, I would be curious to know if phone records from her old phone show her calling Megan's number before (to purchase drugs). I'm leaning towards DB purchasing drugs from Megan or Jersey taht night, likely cocaine -- which might have caused the clicking sounds the boys heard in the night, from the clicking sound of a razor on a mirror cutting the cocaine.
I think Lisa somehow died that night, likely by accident, and DB took her into the woods behind the house where she made several attempted outgoing phone calls, including checking her voicemail and accessing the internet.
A kidnapper is not going to check someone else's voicemail. If they try one phone (and stole 2 others), they are likely to attempt making outgoing calls from the other two phones since the one they're first using (DB's) is not working, and they wouldn't have known that the other 2 weren't working as well. So, you've got three phones, the first one doesn't work, aren't you going to try the other two??
Only DB would know that none of the phones are working and attempt to make ALL of the outgoing calls from HER phone -- and the phone activity suspiciously ends right around the time her husband comes home. I think she was freaking out that the baby was dead and didn't know why her husband was not home when he said he would be. Once he came home, no one makes outgoing calls from DB's phone any more. Because they don't need to.
To further refute the kidnapper theory, I can't in any way see a kidnapper walking repeatedly in and out of the woods -- in 40 degree weather -- with a baby -- to mosy around the streets of the neighborhood for no apparent reason, returning ONLY to the woods (and nowhere else) to make phone calls and search the internet and check DB's voicemail -- remember, no phone calls were made anywhere except the woods, and this supposed kidnapper also takes the time to set some clothes on fire in a dumpster -- then return to the woods. WHAT?!
Keep in mind that the woods are about 1/3 of a mile from the Bradley's home so we're theorizing that a kidnapper walking in a 4-mile radius from the home throughout the neighborhood, returns multiple times to the woods within 1/3 of a mile for the sole purpose of using DB's phone. Yeah right. If you just kidnapped a baby, wouldn't you think the woods are a bit too close to the home? Wouldn't you think there's a good chance the police have been called and that one of the first things they'll do is scan the area around the house?
We could entertain the theory that there were two kidnappers -- one who sat in the woods for 4 hours playing with DB's phone and one who strolled the neighborhood with a baby in freezing weather for 4 hours. But, that just doesn't make any sense. You kidnap a baby and you get the hell out of Dodge. Also, you're in the woods for 4 hours and all you do to entertain yourself is make a few outgoing calls (that don't go through), try to log on to the internet a few times, and check DB's voicemail once? Aren't you getting a little bored in the time in between those few activities? Not if you're DB making the calls because you're running around trying to concoct some believable kidnapping story -- and you're running in and out of the woods back to the hosue, which eats up some time, and you're calling your husband a few times, wondering where the hell he is and, once he comes home, you stop trying to call him from YOUR PHONE.
Keep in mind that eye witness accounts are notroiously unreliable; the vast majority of inmates on death row who were cleared of responsibility had been previously convicted based on eye witness testimony alone. Also keep in mind that one of the Baby Lisa eye witnesses has dramatically changed her story. First, she said that her husband came home and TOLD her about seeing a man carrying a baby wearing only a diaper. THEN, she says she was there and SAW the man!! You can't get more inconsistent than that.
That's my theory.