When would stationary surveillance not be used in an investigation?

In this context, stationary surveillance is typically employed to observe a suspect's movements from a fixed location without drawing attention. However, there are specific scenarios where stationary surveillance is not the appropriate method to use.

For instance, when interviewing witnesses, the focus shifts from observing a subject to actively engaging individuals to gather information. This requires a different approach than surveillance as it involves direct interaction, questioning, and often requires movement to various locations where witnesses may be found. Therefore, stationary surveillance would not be applicable here.

Additionally, collecting evidence from a crime scene also necessitates active participation. Investigators must move around to gather different pieces of evidence, document the scene, and potentially interact with others present. In this case, being stationary would limit the ability to effectively collect and process evidence.

Lastly, delivering subpoenas is a straightforward task that may involve travel to various locations as needed. It does not depend on surveillance but instead requires direct action to ensure delivery to the correct parties.

In summary, stationary surveillance is not suitable when the investigation requires direct interaction with individuals, active engagement with the environment, or logistical actions that involve mobility.