Bartkus is believed to be the person who detonated a bomb at the Palm Springs American Reproductive Center, which offers services like IVF, because he was aligned with the pro-mortalist and anti-natalist movements—the idea that humans should not continue to procreate.

The FBI declared a “blast zone” and cleared residents in the Twentynine Palms neighborhood over concerns that bomb-making materials could be inside a home.

Bartkus was identified as the key suspect by the FBI on Sunday, after his body was discovered near a burned-out vehicle outside the clinic. He had reportedly attempted to livestream the explosion, with a camera found set up on a tripod nearby, although no footage was uploaded online.

Authorities are investigating what appear to be radical views the Palm Springs bombing suspect expressed online in the months before Saturday’s attack. Here is what we know.

Guy Edward Bartkus has been linked to the Palm Springs explosion. He allegedly mentioned Sophie Tinney, a woman who died from gunshot wounds, on his website.

Authorities called the attack terrorism and said Guy Edward Bartkus left behind nihilistic writings that indicated views against procreation, an idea known as anti-natalism.