They are still good to have as a back pocket backup to pull out if needed. Some of these dash cams are really good and record GPS with map overlay, acceleration levels, speed, time stamp, and all this other data that faking them could prove challenging. The benifits outweigh the what ifs. Combine this with your cars diagnostic ports and devices that plug in connect to your phone and corelate the data thus making it difficult to forge.I'm still interested in hearing from a lawyer who has hand-on experience with automotive related law.
Lots of people have opinions, but not a lot of facts. I went ahead and called my two car insurance companies (personal and work) and I talked to two police officers. I would encourage others to do the same thing to see if they get the similar answers.
Both car insurance companies stated current policy is that they (their adjusters) would NOT officially look at the dash cam footage. They follow the fault-determination rules as negotiated between the insurance companies. Even if someone stopped in front of you, then backed their car into you and it was all caught on your cam - doesn't matter, your insurance company pays for your car and their insurance company pars for theirs. Further stated that; dash cams have for the most part been ignored in court and the whole technology has been untested from a legal standpoint.
Both officers (independently) said basically the same thing. When they investigate an automobile accident they focus on physical evidence, written statements and interviews with the drivers and eye-witnesses. Evidence is given a "reliability weighting". Police know that people lie, witnesses are unreliable and the physical evidence could have changed. They base their decisions on their training and experience and ultimately the judge has the final decision. In summary:
1) They would only look at the dash cam evidence if there was a compelling reason to. If all other evidence pointed reliably at a conclusion, that's what they would go with.
2) Dash cams are unproven/untested from a legal standpoint. It is hard to use from an evidence point of view because they are untrained, the quality isn't always good (i.e. rain, snow or at night), it's hard to judge speed and depth of view for distances.
3) Most dash cam evidence can't be examined at the scene and only if the accident is serious enough or there is evidence of fraud will they ask for the flash cards for expert examination.
4) If necessary, they would look at dash cam footage and use it to collaborate/support other more reliable evidence when investigating. They indicated they are aware that the dash cam could have been tampered with.
One cop stated there are scams in the US where the bad guys cause an accident, pretend to call the cops to buy a few minutes, modify the cam evidence on their PC and try to extort money from the victim. The modifications were apparently good enough to pass non-expert review.
So, IMHO dash cams evidence is not yet reliable or proven. It could likely be used to shut down a scammer so for that reason people might find the expense justifiable. Me - no-one I know has ever had this issue, so I'll wait till the technology and legal issues mature.
Here is a good device that plugs into your cars diagnostics port and notifies you of engine problems, improves your driving habits, records GPS, and has an emergency collision feature to name a few.
www.automatic.com
I hope they make a system that somehow combines the two.