Armchair: I just now saw the post you made chiding me for expressing an (to your mind at least) hasty and therefore ill-considered opinion. In fact, I did read your entire post before I made my original comment. My post was not made in sarcasm. To the contrary, I would characterize it as 'in good humor'. I was merely agreeing with you that at least one of the theories you posed was a "stretch".
How can three aliases be used by one person when the LAPD had already said that Chester Turner's DNA was different from GS's? A few days ago, in an LA Times article, the LAPD confirmed that Thomas' DNA is also different from GS's. That is what my comment was referring to...that one person using three different aliases is not possible, given the cold, hard facts of DNA analysis.
Both you and Kundalini seemed to have misunderstood me. My comment ONLY addressed your conjecture that one person was using three different aliases.
I didn't address your second theory, which is that three serial killers might be working together. I have not heard the LAPD (or anyone else) speculate on a friendship, familial connection, love relationship or any other personal connection between these three individuals. It seems to me they would need some kind of connection to bind or unite them in their common (gruesome) purpose.
How likely is it that three unrelated L.A. serial killers would somehow find one another, reveal that they are serial killers to each other, and create a pact? I would say 'no', but also grant you anything is possible.