There isn't any evidence of that or the contrary. He had all the data. We don't know what he did or did not turn over.
Snake oil is a product that is advertised as secure when maker knows it is insecure.
Take another look at this (and Moxie Marlinspike is being generous and sympathetic). It meets your own criteria precisely.
https://moxie.org/blog/lavabit-critique/
There isn't any evidence of that or the contrary. He had all the data. We don't know what he did or did not turn over.
Snake oil is a product that is advertised as secure when maker knows it is insecure.
Take another look at this (and Moxie Marlinspike is being generous and sympathetic). It meets your own criteria precisely.
https://moxie.org/blog/lavabit-critique/