History has provided no evidence that Roscoe Conkling, Chester Arthur, or any other political leader had a part in the shooting.

VOA: special.2010.04.22

Then he made Conkling even angrier by appointing one of Conkling's political enemies Collector of Taxes for the port of New York.

VOA: special.2010.04.22

Almost everyone feared Arthur would be a tool of a Republican Party leader in New York,Roscoe Conkling.

VOA: special.2010.04.29

"As soon as I saw the video of the explosion, I said that looks just like black powder, " Mr. Conkling said.

WSJ: Boston Bombing Suspects Roused by Jihadist Thought

"It's a rather primitive way to build an explosive device, but you could do it, " said John Conkling, a chemist with decades of experience in fireworks.

WSJ: Boston Bombing Suspects Roused by Jihadist Thought

John Conkling, a chemist with decades of experience in fireworks, said the photograph included with the latest criminal complaints "clearly showed they were taking apart consumer fireworks, " probably to get to the explosive material inside.

WSJ: Latest Boston Charges Point to Fireworks Link