Tesla Executive in Purchasing Probe Draws US Scrutiny

The transcript discusses an investigation into Tesla's Project 42, a secretive glass house project. US prosecutors and the SEC are examining whether Tesla's funds were used for a private residence for Elon Musk. Subpoenas have been issued to current and former Tesla employees, and some are expected to testify in court. The investigation is in its early stages, and it remains unclear if it will lead to any legal actions.

What role do subpoenas play in the investigation mentioned in the text?

What are the potential outcomes of the investigation as described in the text?