Let's start over. You say that if a genetic database didn't exist you wouldn't have been made a suspect, so I reply with a random example where you could be made a suspect without the assistance of high tech. To keep the hypothetical relevant, in it they take you into custody and take a DNA sample from you to compare against one from the crime scene. Either they get a match and that makes you more of a suspect, or they don't and it doesn't. If they get a match, potentially you'll need to convince a jury that the presence of your DNA at the crime scene doesn't mean you had anything to do with the crime.
I don't see what the existence of the database changes. With or without it there are ways by which you can be linked to a crime you had nothing to do with, and it doesn't seem like it can't be used for anything other than quickly getting a list of people who might have been at a crime scene. The article you linked is not about DNA databases, it's about how DNA evidence is misused by law enforcement. All it says about DNA databases is that black people are over-represented in them.
Sorry your judicial system depends on the savviness of random idiots off the street, but it has nothing to do with whether companies like this one exist.