As the manhunt for a suspect in the Brown University shooting continues, following the release of a person of interest, authorities must now go back over all of the evidence.

“No investigation is perfect and you’re going to go through ups and downs,” CNN Law Enforcement Analyst and former FBI Special agent Steve Moore told Rosemary Church.

Moore said part of the solution now is to restart the investigation, because whatever led authorities to the person “was obviously an error.”

“So you pretty much have to throw out, not the evidence, but the conclusions from the evidence,” he said. “And you start, basically, as if you’re seeing the evidence for the first time and say ‘Where should this lead us?’”

Moore said it’s encouraging, however, that the shooter has not launched another attack –– and this should assure the community that there is no immediate threat.

“It would indicate to me that they didn’t have further plans for violence. So to me, it mitigates towards people having a reason to feel safer,” he said.