Palm Springs police chief believes others may have known suspect was planning explosion

PALM SPRINGS, Calif. (KABC) -- Days after a car bombing outside a fertility clinic in Palm Springs, investigators are still searching for a motive.

Investigators say Guy Edward Bartkus had multiple social media accounts where he posted videos of homemade explosive devices and messages alluding to his plans. Some of his videos date back six years.

MORE COVERAGE: Palm Springs police chief believes others knew about suspect's plans

Palm Springs Police Chief Andy Mills believes others may have known Guy Edward Bartkus was planning to attack the fertility center.

The 25-year-old's car bomb went off outside the American Reproductive Centers on Saturday. FBI officials confirmed Monday that DNA evidence collected at the scene was matched to that of Bartkus.

All eggs and embryos that were being stored at the clinic survived, mostly because of a deputy fire chief.

Police Chief Andy Mills believes others may have known he was planning to attack the center because of his online videos.

"If you see it, you own it," Mills said. "In other words, you're just as culpable as the person who pulled the trigger or set off the bomb. If you believe something was going to take place, you saw them googling mass casualty incidents, active shooters, you know, serial killers - and you didn't speak up? Morally, you own this."

Mills said people with knowledge of the situation could face charges from the FBI, depending on what they knew.

Meanwhile, video from AIR7 shows agents combing through the suspect's home in Twentynine Palms, which is about 50 miles from the site of the explosion. They're trying to determine a motive and figure out how Bartkus was able to get his hands on so many explosives.

The suspect's father, Richard Bartkus, told the New York Times he and his son were estranged. He said as a teen, his son would make smoke bombs.

The FBI left the scene Monday night.

People who live on that street had been evacuated as a precaution in case there were more explosives at the home.

Thomas Bickel lives in one of the cottages in the complex right next door to where Bartkus lived. He says he spoke to an investigator Monday afternoon when residents were allowed back home.

"All they really told me, the guy's exact words were he had like an explosives laboratory in there," Bickel recalled. "Although he built a pretty big bomb that he took down to Palm Springs, there was still enough material in there to do serious damage... That's why it took almost three days for them to clear the area, because they had to be really careful."

Bickel said very few of his neighbors ever really saw Barkus.

"Even though he lives right there, I've never seen him," Bickel said. "The guy who lives in the cottage directly behind me that's closest to his garage, he said he's seen him once."

Authorities say Bartkus left behind "anti-pro-life" writings before carrying out the targeted attack investigators called terrorism.

His writings seemed to indicate anti-natalist views, which hold that people should not continue to procreate, authorities said. He reportedly believed human life is mostly suffering, and therefore, should not be created.