A detector monitors the presence, absence, insertion, and/or removal of an object in a holster. The detector broadcasts a message to an electronic device reporting whether the object, such as a weapon, has been removed from the holster and/or if the holster lock has been unlocked. The detector repeatedly probes for the presence of the object in the holster. The electronic device, in response to authenticating the message, may control the recording of audio, video, and/or other data in conjunction with the insertion or withdrawal. The detector stores information about when an object has been removed or inserted from the holster and provides it the electronic device.