ABC TV - already in the public domain but reproduced here to educate the public, courtesy of independent researcher Alexander Baron, (born 1956).
This is an extract from a fairly lengthy ABC TV documentary about the Kennedy Assassination; this particular segment focuses on a computer analysis of the actual shooting.
This is an excellent antidote to the garbage espoused by grand conspiracy cranks such as Daryl Bradford Smith. There is no excuse for this kind of ignorance in the age of the Internet.
Check out the complete documentary - and get educated.