There have been new details released about an explosion that leveled a home in Cambria County Tuesday morning. Police said it was an attack on the family that lives at the home and they're calling the man who did it a suicidal bomber with an intent to kill.

Investigators said the homeowner, Bill Shaner, suffered major injuries. He's in the ICU at a Pittsburgh hospital. His son was also hurt but investigators said not as badly.

Police said Bradley Kollar had it out for the Shaner family. What they're not sure of at this point is why.

Cambria County District Attorney Kelly Callihan was trying just last year to revoke Kollar's bond and throw him in jail. She said she was afraid something like this explosion would happen because she knew he had access to explosives.

Court documents show the 40-year-old Kollar pleaded guilty to several charges last year after police found the makings of a meth lab in his Hastings home. Police said he was supposed to show up for sentencing Tuesday morning, but instead he drove to the Shaner family's Clearfield Township home and detonated some type of explosive device, killing himself and critically injuring two others.

"Around June of last year, my office petitioned the court to revoke Mr. Kollar's bond because we had concerns that he was suicidal and that he had access to explosives," said Callihan.

Callihan said Kollar was known to have some mental problems and had attempted suicide by explosives in the past, including just last year when court documents said he constructed a 1,600-pound bomb.

"I loaded everything up and I went way back into the woods and I sat there on top of the barrels," said Kollar in a recorded phone conversation. "It took me about two hours before I could ... light the damn fuse."

Police said the conversation was recorded last year when Kollar called an inmate at the jail. In it, you can hear his frustration that his attempt didn't work.

"I opened my eyes up and saw smoke. I said it's still going, it's still going," said Kollar in the recording. "I was sitting there and I look and all of a sudden it went out."

Because of that incident, the district attorney's office petitioned the court to revoke Kollar's $200,000 bond. But Judge Norman Krumenacker denied the motion; he ruled that suicide is not illegal.

"We felt at that time he was a safety risk not only to himself, but to others," said Callihan. "Unfortunately, we were unsuccessful. The court did not revoke his bond."