One way, he said, is to have an investigator follow the injured party and record the person's activities on videotape.

After the feeding session, the investigators followed the apes for the rest of the day.

Private investigators have always followed the footsteps of people's personal lives.

A private investigator follows a woman who is having an affair with Doop.

The investigators followed the two groups, detailing repeat suicide attempts in interviews.

While their patient did not survive, other investigators followed their lead with some success.

The investigators followed a trail of blood drops into a small hallway that led to the kitchen.

The investigators are following the patient with the positive test to see if he also has Alzheimer's.

But when pressed as to what leads the investigators were following, the sheriff and others said they had nothing beyond hunches.

During both inquiries of the last two years, congressional investigators routinely followed leads they had read about in the morning newspapers.