Dan I will lay out what I think as best I can.
.........
Was he involved in the Walker "shooting".....yes
Was he aware of some sort of "attempt" on 11/22/63......likely
Colin, you strongly suspect the reported incident at Edwin Walker's residence was staged (as described by Walker to police)
or some other sort of deception and Oswald was acting on instructions or an understanding with one or more others, (related to
a planned presidential assassination or assassination themed incident) insofar as he his presence at the TSBD at 12:30 pm on 22 November?