It was one of the few times I'd ever seen Harry caught trying to cover up his tracks.
So cover up your tracks and get away from here!
But he didn't cover up all his tracks this time, and someone was after him now.
While these discussions are going on, the murderer seems to feel safe with no need to cover up their tracks any further.
"In that case he has a positive genius for covering up his tracks."
Ore and I covered our tracks up from the beach to make them think there were no survivors†or survivor.
For this was the last thing that he needed to cover up his tracks.
They liked to set fire to houses, too, to cover up their tracks.
Whoever had used it had covered up his tracks well.
But I hadn't realised how quickly the snow was covering up my tracks.
Idiome