The Apollo 1 conspiracy theory again...deep sigh...The last time I corresponded with Scott Grissom he seemed obsessed with the notion it was murder. He claimed that a part of the Apollo 1 instrument panel was missing, and that it would prove murder. He told me where this "thing" was on the instrument panel- or at least should have been. However, he would not say what it was, where he thought it was, or why his father was "murdered". I got the impression he was as nutty as a fruitcake, and that anything he says should be viewed as highly suspect. I stopped corresponding with him because I found the majority of his "facts" proved highly suspect. A number of people in the newsgroup sci.space.history found him a bore because he droned on about his dad being murdered so much. He claimed that somehow Schirra was involved in a cover-up of some sorts, but would not give any particulars when asked to provide them.
After the fire flight assignments were changed. Schirra, Cunningham, and Eisele *** became *** the backup crew, but they were not the original backup crew for Apollo 1 as this tidbit from Chariots For Apollo indicates...
Announced 21 March 1966
First manned flight - orbital
Prime crew: Virgil I. Grissom, Edward H. White II, and Roger B. Chaffee
Backup crew: James A. McDivitt, David R. Scott, and Russell L. Schweickart.