cover (one's) tracks
To conceal traces so as to elude pursuers

[TahlilGaran] Dictionary of Contemporary English ▲

cover tracks
cover (your) tracks
to hide or destroy anything that shows where you have been or what you have been doing.
Roberts covered his tracks by throwing the knife in the river and burying his wife's body miles from his home.

[TahlilGaran] English Idioms Dictionary ▲

cover one's tracks
to hide where one has been, to hide what one has done
The man was trying to cover his tracks but it was easy to see where he had been.

[TahlilGaran] English Idioms Dictionary ▲

cover one's tracks
v. phr.
1. To hide and not leave anything, especially foot marks, to show where you have been, so that no one can follow you.
The deer covered his tracks by running in a stream.
2. informal To hide or not say where you have been or what you have done; not tell why you do something or what you plan to do.
The boys covered their tracks when they went swimming by saying that they were going for a walk.
Compare: COVER UP¹.

[TahlilGaran] English Idioms Dictionary ▲