I just thought of something, in this intervier mps brother says @ 4:26 he "forwards" a text to both sisters and mom and mp was the only one to respond. A) to my understanding when uou forward a text that means someone had sent you the original and you send it to a third party. If that's the case who sent the original? B) maybe he didn't mean forward but meant "group text" to mp sis and mom. In which imo both scenarios would be more crucial if ds had her phone at that time, thus speeding up the process(shrinking the time line).