run someone to ground
run (someone or something) to ground
To succeed in tracking down the location of someone or something after an extensive or exhaustive search. After nearly three months of searching, we finally ran the suspects to ground. The record is quite rare, but I managed to run a copy to ground at a flea market in Atlanta.
run someone to groundBRITISH
If you run someone to ground, you find them after a long search. The thief was eventually run to ground in a garden shed. Compare with run someone to earth. Note: In hunting, this expression is used to refer to a fox being chased back to its hole.