A local law enforcement officer spotted a suspicious man carrying a range-finder "in or just-outside" the venue before former President Donald Trump took the stage at his rally in Butler County, Pennsylvania on Saturday night, according to a law enforcement source.
The officer reported the sighting to state police, the source said. He took a photo, and there was a discussion about whether what he was carrying was a pair of binoculars to try and see the rally better.
A few minutes into Trump's remarks...