The son of the late Supreme Court Justice Antonin Scalia rejected conspiracy theories that have been circulating about his father’s death in a radio interview Wednesday.

“Our family just has no doubt that he was taken from us by natural causes,” Eugene Scalia said on the conservative Laura Ingraham radio show. “We’re praying for him. We ask others to accept that and pray for him.”

Scalia died at age 79 on Saturday at a ranch in West Texas. Ranch owner John Poindexter initially told a local newspaper that he found Scalia in bed with “a pillow over his head,” but he later clarified his comments to CBS. Poindexter said Scalia actually had a pillow “over his head not over his face as some have been saying.”

On Tuesday, a conservative radio host goaded Republican presidential candidate Donald Trump into answering whether he thought Scalia was “murdered.” Trump called the circumstances of how the pillow was allegedly found when Scalia was discovered dead “unusual.”