Elon Musk reportedly aimed to use Tesla's internal driver monitoring camera to gather evidence for autopilot-related lawsuits, according to a biography by Walter Isaacson. The cameras, first introduced in Tesla's Model 3 in 2017 and later in S/X models, were not activated until 2021. They are now used to ensure drivers are focused on the road while Autopilot or Full Self-Driving systems are engaged. Musk's primary motivation for using the cameras was allegedly to protect Tesla and himself against lawsuits or investigations.