A federal court in Miami began considering Monday whether Elon Musk's car company should share blame for the death of a stargazing university student after a runaway Tesla sent her flying 75 feet through the air and severely injured her boyfriend.

The case is the first suit related to fatal crashes involving the electric vehicle company’s Autopilot system to go to trial.

A critical voice took the stand Wednesday in the first-ever federal jury trial involving Tesla’s Autopilot system: a safety expert who says the technology is defective and promoted in ways that encourage misuse.