A former Tesla process technician, Martin Tripp, is tweeting internal emails, photos and vehicle identification numbers that he says are evidence of flawed manufacturing practices at Tesla's battery factory, and of product sold by Tesla that is imperfect, and could put drivers' lives at risk.
Tesla has characterized Tripp as a disgruntled ex-employee and saboteur in the past.
Tripp, in previous interviews, said that Tesla's Gigafactory took dangerous manufacturing shortcuts, and that Elon Musk had direct knowledge of these but failed to intervene.
The tweets were posted to Tripp's account Wednesday. However, Tripp took down his Twitter account by Thursday morning, his lawyer told CNBC.
The lists of vehicle identification numbers, which he wrote in the tweets, refer to specific cars that received batteries containing damaged cells that never should have been installed.
Tripp also tweeted pictures that he claims prove Tesla is storing waste or scrap in open parking lots and trucks at the Gigafactory, rather than temperature-controlled warehouses. He also shared screen shots of graphics that he says show a high volume of waste at the factory.