The Aarushi Hemraj double murder case has started haunting me again after a long time. Last several nights went by staying up reading and researching the case, the facts, the sequence of events. At this point I believe I've exhausted all information available on the web, including court documents which contain the official arguments/narratives put forward by prosecution and the arguments of the defense.

There's only two possibilities here - 1) the parents or 2) an unknown outsider. Those 3 servants are not suspect imo because all of them had strong alibis, and there was no evidence found against any of them (no fingerprints or DNA)

Now coming back to the two possibilities, the most frustrating thing is that I'm unable to form an opinion towards any one the two despite an enormous amount of thought and perspective, because strangely there's a sufficient amount of gaps/loopholes for each. Below I'm leaving some difficult questions that linger in my mind that defy both possibilities. Proponents of either theory are welcome to share their insights and help me out of this dead end.

Theory 1: Parents did it

Q1: Why were neither of the parents' DNA/fingerprints found in any of the places or from collected evidence? (like the bloody whiskey bottle)

Q2: Hemraj's blood stains were not found in the house anywhere except the terrace, and there is strong evidence that he was murdered directly on the terrace (court also took cognizance of that), why would Rajesh Talwar murder him on the terrace?

Q3: How did the Talwars manage to clean/destroy their clothes which would have been completely soaked in blood given the splatter pattern of both murders

Q4: The footprint found on the terrace was a much bigger shoe size than Rajesh Talwar's size

Q5: If we believe that they cleaned up all evidence/clues, how would they miss the Scotch bottle which was pretty obvious? Why would they miss wiping off the handprint on the terrace? They had ample of time.

Theory 2: An unknown outsider did it

Q1: Rajesh Talwar admitted sending an email at 11:40 pm which means he likely would have been awake till at least 12. Acc to forensics, Aarushi was killed between 12 and 1 am, how would an outsider enter and kill Aarushi in such a small time window

Q2 It is clear that it would have been a friendly entry not a forced one. But how would Hemraj know when the outsider arrived? Either they gave him a phone call or rang doorbell. If they rang doorbell parents would have heard clearly, it would have been risky. If they gave him a phone call, Hemraj's phone records would show it

Q3 What exactly was the outsider's sequence of activities? We can logically establish that Hemraj was killed first. Because if Aarushi was killed first, then the murderer somehow convinced Hemraj to go with him to the terrace, killed him there, then CAME BACK to the house (whisky bottle have blood of both) even after both are dead, which makes no sense. So instead logical chain is that murderer took Hemraj to the terrace first, killed him there, then came back to the house specially to kill Aarushi because she knew about his presence (this theory is also supported by forensic expert TD Dogra). But now here's the main question - while leaving, why would the murderer latch the middle mesh door ONLY. If he wanted to delay anyone coming after him, why not also latch the outermost grill door? The latching of only the middle door to me strongly suggests that it was intentionally done to make it look like an outsider job.

Q4: Evidence shows that Aarushi's room was dressed to some extent, particularly toys and school bag were placed neatly after killing her, since they did not have visible blood on them. There is also some evidence about cleaning up her private parts (though this was contested by defense). Why would an outsider spend time placing her toys like that after killing her?

Q5: Why was blood not found in any other part of the house? Even if Aarushi was killed in her room won't the killer be stained with blood and leaking blood all over the house floors? Including the living room floor. (Especially when Arushi's blood was indeed found on the whiskey bottle).

Does the lack of blood suggest someone cleaned up the place? An outsider wouldn't spend time doing that

Q6: Why was Aarushi's phone not destroyed by the killer but rather left in some park? This is again one of those things which feels intentionally done to point towards an outsider theory. An actual rational outsider killer would just destroy the phone

The answer to the most perplexing mysteries lies in the little details I believe.