The Biggest Loss in the Investigation of the Nine One One Caller

Who is the person who made the call to nine one one? Are they included in the three suspects? Do they have d and a from this person? You know, it just seems like a glaring whole. I wish there was more an this is a case that i wish had more coverage, but maybe we'll learn more in the future. Right now, there's a lot of things i'd like to know that we don't know right yet.