If, as reported last night, there were two snipers in positions to triangulate law enforcement, then it’s pretty obvious it was coordinated.
But we don’t know for sure if that’s the case.
I don’t know about the term conspiracy. I’d just say if several are involved and they coordinated their activities, it would be a planned attack. Like Benghazi.
Conspiracy means more than one person working together. People assume it means something more elaborate than that.
Fox Biz just reported that Dallas PD says it was a lone gunman.
FWIW