I'll put up a map I posted long ago. MOO I'm no cell phone tower expert (wish I was, after this case...), but I do suspect that if CR drove 200th St. south to 460th, then near that 200th/460th intersection her phone could possibly have pinged off two towers (Deep River and Guernsey) because they are relatively the same distance apart. If he headed east on 460th a little bit, which would put him less than a mile straight north of the pig farm, maybe he left the the Deep River tower range because Guernsey was closer, so her cell pinged again. From there, if her phone stayed in the same sector of the Guernsey tower, it might not ping again (I've read it could be hours if in the same spot). That could explain the last ping being near the pig farm, and if you look at the estimated ranges and sector of my map (which is ONLY my guesstimate), yellow would be the area you would search based solely on the cell phone pings, and that is the area where many of the known searches happened. JMOCould the hog farm ping come from where she was in the cornfield?
Is it in the right vicinity?
Note: The pig farm is inside that purple box. The blue line is the travel route, and the body site is at the end of that blue line.