Which of the following is NOT a source of information for criminal investigators?

Television networks are not typically considered a direct source of information for criminal investigators in the same sense as the other options listed. While television networks may provide coverage of criminal cases or events that can be observed by the public, they do not usually offer actionable intelligence or information that can lead to the resolution of criminal investigations.

In contrast, utilities can provide valuable information about incidents or patterns that may be relevant to an investigation, such as utility records that indicate activity at specific locations. Informants are often pivotal in investigations, as they provide insider knowledge or tips about criminal activities. Surveillance, whether through cameras or undercover operations, directly gathers evidence and information about criminal behavior. Each of these sources plays a crucial role in the investigative process, making them integral to the work of criminal investigators, unlike television networks which serve more as a media outlet rather than a source of investigative data.