Why the Secret Service closed its investigation of cocaine found at the White House without conducting interviews

The Secret Service on Thursday announced it had closed its investigation into who left a small packet of cocaine in the White House without finding the culprit, and a spokesman for the agency told NBC News it did so without conducting interviews. The agency, along with the FBI, tested the packet to determine it was cocaine and looked for any fingerprints or DNA evidence. “Yes, you could have a consensual interview,” he said, meaning the interviews would be voluntary. “They could have done the interviews, but at the end of the day it’s a long walk through dry sand,” said Rosenberg, an NBC News contributor. “They have finite resources and it’s OK for them to decide some things are worth their time and some things are not worth their time.”