paper trail
A written record, history, or collection of evidence.
Keep a good paper trail in case anyone asks you why you arrived at that conclusion.
ADJ
scent
The dog picked up a fresh scent trail and ran toward the woods.
blood, smoke, vapour | thin | muddy | false
VERB + TRAIL
lay, leave, make
The hikers made a trail through the forest so others could follow them safely.
pick up
The detective picked up the trail again after finding a new witness.
follow
lose
The detective lost the trail when the suspect disappeared into the crowded shopping mall.
TRAIL + VERB
go cold
The police worked quickly because they knew the suspect's trail would go cold if they waited too long.
PREP
on sb's ~
The police are on the suspect's trail after discovering evidence at the crime scene.
PHRASES
a trail of blood, a trail of devastation
The injured animal left a trail of blood across the forest floor.
a trail of smoke
ADJ
forest, nature, woodland | 10-kilometre, 5-mile, etc. | cycle, mountain bike, tourist, walking
hippy, tourist
We discovered a charming village that wasn't on the usual tourist trail.
campaign, comeback, winning
The struggling band is finally on the winning trail with their new album.
VERB + TRAIL
follow, hit
After university, many young people follow the backpacker trail through Southeast Asia.
be on
Police are on the trail of the bank robbers who disappeared last week.
TRAIL + VERB
go, lead, wend its way
The hiking trail goes up the mountain and ends at a beautiful viewpoint.
PREP
along a/the ~
ADV
slowly | wearily
PREP
after
The little dog happily trailed after its owner through the park.
around/round
The hikers trailed around the mountain for hours before finding the main path.
(along) behind
ADV
badly
The home team was trailing badly by halftime, down 3-0 against their rivals.
PREP
by
The home team was trailing by three goals when they scored twice in the final minutes.