The man authorities allege set off a deadly car explosion outside a California fertility clinic left behind chilling online writings

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.

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.

A motive for the bombing at a fertility clinic in Palm Springs has been revealed after a 25-year-old man named Guy Edward Bartkus was linked to the blast.