Final answer:
Enhance security checks by inspecting mirrors, searching furniture for hidden compartments, and investigating all possible tampering signs, in addition to being aware of key holders.
Step-by-step explanation:
When ensuring security against unwanted entry, beyond checking the locks on doors and windows, it's essential to examine several other elements. First, inspect mirrors and any spaces where someone might be able to hide or where a surveillance device could be placed. Next, conduct a thorough search of furniture, including drawers and cushions, probing for any hidden compartments or objects. Examine the beds and bedclothes, curtains, and carpets for disturbances or signs of tampering. Moreover, consider who has access to the building, such as key holders. In densely-populated buildings, multiple keys may exist, so it's important to know who has them and ensure they are trustworthy individuals. In summary, security checks should be comprehensive, covering every potential entry point and hiding spot, and be mindful of access control regarding who has keys to the property.