@OldAce - while I can follow your logic, at the end of it I'm left with: all that for what? I mean, it seems like a lot of work/planning/likely multiple people involved to abduct / other a single male in an 18-wheeler. What could the possible motive be, to justify all this? In other words, why not just grab him in his car or anywhere outside of his truck/route?
Do you think David shut it down, or someone else?
Fist answer is: To kill David under some weird circumstance/desires of the perp/s.
Engine yes... Lights off and no flares, no. And probably at perps instruction. As in shut it down and get out. Automatic to David, it is idling or idle a little more. Perp says kill the lights and get out.
Sorta defeating there, no lights, dangerous in dark... Lit up, be visible for a mile or so. Sitting in a strange place, not moving. Another of the at/odds events to logic.
(Time changes things.)
In my day we were required to have 3 kerosene pot flares, 3 red flags. and 3 railroad fuzees.
The were sold and installed in a red metal oblong box. Action was in case of hazardous occurrence: Wreck, stall in roadway with poor visibility or blind curve. In hours of darkness, jump out, grab a fuzee, strike it and stick in the ground, pavement crack, alongside and across the roadway. This was to provide immediate warning. Then get out the pots, set one 100 feet behind, one 100 feet in front, and another alongside across roadbed.
In daylight, do not light the pots, but insert the little red flags into a slot on the pots to display.
Strangest of all.. These were usually bolted to the right hand passenger side step and sometimes had a small padlock to prevent theft. Time you got out, walked around, undid the lock (if not rusted/frozen), got the fuzzes out, walked back to the other roadside, lit it and staked, come back, picked up and placed the 3 pots...
At least 3 other vehicles could have crashed into you...