DANVILLE, Ill. (AP) _ Police went on gathering details about a troubled man killed by an explosion before authorities could question him about a church bombing, and they found a second destructive device in his yard.

Investigators would not describe the package discovered outside the home of Richard Dean White on Friday or what caused the explosion that killed him in his garage Thursday. The second device was destroyed.

The church bombing investigation isn't closed, said incoming state police Director Gene Marlin.

``The end of this won't be until we can positively say this is exactly what happened and this is the person who exactly did that, and be able to prove that with the facts,'' he said.

Police continued trying to gather details of White's life. The Army veteran was described as an eccentric who had been in and out of mental wards in veterans' hospitals over the years, state police spokesman Mark McDonald said.

The bearded, 300-pound White, also known as Richard D. Shotts, was killed as FBI agents were on their way to question him about the bombing Sunday at the First Assembly of God Church in Danville. That blast injured 33 people.

It was the second at a Vermilion County church in less than six months. A bombing on Dec. 30 outside the Oakwood United Methodist Church in nearby Oakwood killed a church volunteer who moved a package containing the bomb.

Authorities have not established a link between those bombs.

Federal agents said White, 39, was not classified as a suspect in the Sunday bombing but was one of several individuals in this east-central Illinois city whom they had wanted to question.