I haven't come across any masonic symbols (yet) but there are links to the occult. The El Paso shooter's father: https://media.8ch.net/file_store/cfc4560b283d4af877ef01caa7c4fe58e9c094c3308c8f697334154a47ae8c1a.jpg AND  https://media.8ch.net/file_store/8d7fead41307d1ae39386780139c7ed4924389c4a17aa03211089b4a39529aed.jpg  AND the Dayton, Ohio shooter's picture where he's wearing satanic patches on his jacket.( I copied it but can't find it right now....will post it here later. PLUS I saw that Red Cross was there and tons of people were lined up to give blood.