I've searched the web, but there isn't enough information to say if it supports a foot pedal or not. Theoretically, if IndigoVision Incident Player was developed for such purpose, it should work properly with a foot pedal regardless of the connection mode used.
Access its built-in Settings menu to see exactly what are the available options and if you can connect a foot pedal.
While doing this, make sure to connect the foot pedal to PC and to install the available driver so Windows can make it generally available for apps and other devices.