Which of the following is NOT allowed for a Private Detective in Illinois?

Engaging in wiretapping without consent is not allowed for a Private Detective in Illinois due to strict regulations surrounding privacy and electronic communications. Illinois law requires that any interception of communication, including wiretapping, must have the consent of at least one party involved in the conversation. Violating these laws not only undermines the ethical conduct expected from private investigators but also places them at risk of severe legal repercussions, including potential criminal charges.

On the other hand, conducting background checks with consent, surveilling in public areas without a warrant, and interrogating witnesses as part of an investigation are all permissible actions. These practices are considered legitimate as long as they comply with relevant laws and ethical standards. Background checks require the consent of the individual being investigated, which aligns with privacy rights. Surveillance in public areas is typically allowed since individuals do not have an expectation of privacy in those spaces. Interrogations of witnesses can be conducted as part of due diligence in an investigation, provided they are approached in a lawful and ethical manner. This context highlights the importance of understanding privacy laws and ethical guidelines for private detectives in Illinois.