Simpson Suicide?

In his book, "If I Did It," Simpson describes a scene during his infamous Bronco chase where he debated killing himself with a Magnum:

A.C. drove another half-mile or so and pulled into an orange grove, where no one could spot us, not even from the sky. He got out to take a leak, and the moment he left the Bronco I reached for my grip. I unzipped it and pulled out the Magnum. I was in tremendous pain, and I saw nothing but more pain ahead of me, and I decided to end it. I realized, I can make this stop. One shot to the flicking [sic] head and it's over.