Mr. Cunningham. No, sir; the Dallas Police Department did.
Representative Ford. The FBI did not?
Mr. Cunningham. We did not, sir.
Representative Ford. You didn't analyze it?
Mr. Cunningham. We did not. We obtained the paraffin casts and another agent in the spectographic unit took them to Oak Ridge and had them subjected to neutron activation, with which I am not familiar. But we did not do the original examination and the reporting. I don't know definitely as to what the Dallas Police Department did.
Mr. Eisenberg. It was under the supervision of the Dallas Police Department. I think a doctor performed the test, I am not sure whether it was a police doctor or not.
By the way, after the paraffin test is run, does the positive reaction stay evident on the paraffin cast?
Mr. Cunningham. No, it does not, due to the fact you have to wash it off. The solution of diphenylbenzidine is 70 percent sulphuric acid. The solution we were using in these tests was .25 grams of diphenylbenzidine to 100 ml. of 70 percent sulphuric acid, and sulphuric acid is corrosive. In other words, the majority of the solution is 70 percent sulphuric acid.
Mr. Eisenberg. So the casts as they are now don't show anything except white paraffin?
Mr. Cunningham. That is correct.