Someone must have deliberately tampered with it, for I have never known it gain or lose before.

Are you suggesting you may have been deliberately tampered with in some fashion?

Liu Bang learnt from Xiao He later that actually all the ten pieces of paper contained his name, and Xiao had deliberately tampered with the system to help him.

They've deliberately tampered with the will of the gods!

When the gold was brought to Brennus in the Forum, he had it reweighed on scales he had deliberately tampered with, then complained he was being cheated.

Mr. Brammertz's predecessor in the job, Detlev Mehlis of Germany, had complained that Syrian and Lebanese intelligence officials had deliberately tampered with the site, covering over a crater and removing crucial evidence.

Chief Inspector Francis A. DeFrancesco of the state police said that the Harding case was the first time in the 75-year history of the state police that an investigator had deliberately tampered with fingerprints or other evidence.

Searchlight signals have the disadvantage of having moving parts which may be deliberately tampered with.

A third combination of facts: the Furs' brains have been deliberately tampered with.