Xiōngshǒu wèile shārén-mièkǒu, yòu liányè qián huí xiànchǎng.
To silence the witness, the killer sneaked back to the scene that same night.
Guānjiàn zhèngrén bèi bǎohù qǐlái, yǐfáng yǒurén shārén-mièkǒu.
The key witness was placed under protection in case someone tried to kill them to bury the evidence.
