Summer 1997

• Traces all done

  • Confirmed that the intruders are who we thought they were, sigh
  • Get permission to set up pen registers

• Pen registers

  • Record numbers called, caller-id
  • Left running for a month or so

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We finally get permission to set up pen registers. These attach to the phone line going to a suspect’s house and record the calling number for all incoming calls (caller-id) and the called number for all outgoing calls.
There’s a collection station (strange old laptop with lousy software) that receives this information from the devices.