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Unlike today’s new electric cars, with their limited range and speed, General Motor’s now-defunct EV1 could travel between 60 and 120 miles and reach speeds of 60 mph in under nine seconds. An early GM prototype even set the land-speed record for electric cars in 1994 at 183 mph.

But, this revolutionary marvel of modern-day electric automotive technology is now extinct. This year marks the 10th anniversary of the EV1, which required no gas, no oil changes and was owned by celebrities such as Tom Hanks and Mel Gibson. So where have they gone, and who is behind their disappearance, or as some would say—their murder? A new documentary, Who Killed the Electric Car from Director Chris Paine, puts the pieces together in this Agatha Christie-esque whodunit. The killer could be anybody—General Motors, the government or even the American car-buying public.

Check out the clues at whokilledtheelectriccar.com, and you decide.