track down
• find someone or something after a thorough or difficult search.
• "it took seventeen years to track down the wreck of the ship"
Similar:
discover,
detect,
find (out),
hunt down,
hunt out,
unearth,
uncover,
disinter,
turn up,
dig up,
seek out,
ferret out,
root out,
nose out,
bring to light,
expose,
recover,
capture,
catch,
smell out,
sniff out,
run to earth,
run to ground,
run down,
suss out,
