this investigator for "boston globe" investigated for decades. he first interviewed rick abath for the night of the crime for the "globe." he told the alarm was designed to keep visitors from getting too close to the rembrandt. >> that sea scape, even if you look at prints of it now, images of it now, you will see an etching of rembrandt itself. odd experts, odd specialists, common folk knew that. they would come up and put their finger close to, point out the image of rembrandt. if they got too close, the alarm would sound. >> reporter: he says the thieves then smashed the alarm. >> that was really a compelling little detail to me because it seemed like that worked. that -- if you got too close, the sound would go off. as i went through the rest of the security that was in place at the museum, nothing else was there to guard the museum's valuables. >> reporter: like the motion detectors, this alarm was not