Electronic Surveillance includes monitoring an individual’s use of their phones, email, and social media.
Physical Observation is when investigators physically follow or watch a subject. This can potentially involve disguises, stakeouts, and multiple investigators.
Interviews are conducted by investigators to discover as much information as possible about the subject.
Technical Surveillance encompasses digital photography and video/audio recordings.
Overt- security footage businesses use
Covert- undetected surveillance
Mobile-follow on foot or vehicle
Stationary-staked out at subject location
Mechanical- wildlife cams, stationary camera monitoring