The Supreme Court on Friday dashed President Donald Trump’s plan to immediately fire the head of an independent agency that investigates whistleblower claims, allowing Hampton Dellinger to remain in the job through at least the middle of next week.

A lawyer for Luigi Mangione, the man accused of fatally gunning down U.S. health insurance executive Brian Thompson in December, told a judge Friday that her client was illegally searched during his arrest and she would seek to exclude that evidence from his trial on state murder and terrorism charges.

The Trump administration fired Hampton Dellinger, head of the Office of Special Counsel, who sued to overturn the decision.