Well, I'll try to share below part of what I gleaned from today's edition of Dallas Morning News.
Quotes from Mrs. Pamela Willeford, the third person in the hunting party.
"We really thought he was way back behind us."
"The three of us were out of the vehicle hitting a covey. Harry Whittington dropped back to pick up a bird he'd shot. The vice president and I moved on to shoot another covey, and unbeknownst to us, Harry had picked up a bird and caught up with us. He had walked up, and we didn't realize that he had caught up with us."
"He was back behind us, and we turned off to the left to shoot another covey ... The bird came up and was going back down, and you know how you swing on it, with your gun, following a bird."
In a separate article, Outdoor writer Ray Sasser was rather objective, with headlines of "As hunting accidents go, Cheney's is not unusual" and "Vice President, victim share blame in incident, Texas experts say"
It included a quote from Steve Hall, TP&W's hunter education honcho: "In hunter education, we refer to that phenomenon as 'target fixation'. Every year, it's the primary cause of Texas bird-hunting accidents."
Dr. Dale Rollins, an A&M Extension Biologist explained that "having one member of a hunting party stray from the main group is always risky" and that "The protocol in quail hunting is to walk in a straight line to the pointing dogs and remain aware of the location of hunting partners."
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Yep, or as I stress in hunter ed. classes, "Plan your hunt, then hunt your plan." Sounds like they deviated. And unfortunately, are paying a steep price.
On a lighter note, when seeing one of the early newscasts on the tube, The Wife sez "28 gauge? Is that right?". I explained that they were somewhere between a .410 and a 20 gauge, somewhat of an expert's or often a "rich man's gun". She sez, "Oh, OK. We dont' have one of those, do we? But we've got just about everything else ..."