[Y-bar]

Why does not the investigator have to supply some sort of evidence that she has a history of leaving their local area rather than putting the onus on the accused? This line of argument is halfway to "guilty until proven otherwise".

[mlinsey]

You and the GP that replied to me are way overstating what it means to be a "suspect". It just means the police are investigating you and consider it a possibility you've committed the crime. On its own, is not a sufficient status to search your home, subpoena your ISP, or arrest you - all of those things require a much higher burden of evidence, and oftena third party (judge's) approval. People routinely become "suspects" on much flimsier evidence than an unreliable software match - if I call in an anonymous tip that I saw you acting suspicious near the crime scene, you will probably become a suspect.

If you'd like, you can replace the term "suspect" in my post with "person of interest", which colloquially implies a lot less suspicion but isn't practically any different in terms of how the police interacts with you.