But when Nucky was told about the hit, didn't the guy say the news came from Rothstein?
The hit was ordered by Rothstein after Nucky presented his argument that Gyp was dangerous for everyone. One small giveaway to that was when Rothstein and Gyp were in the diner and Gyp mentioned his hotel room to the paper boy you could see the interest in Rothstein's eyes as he got the information on where Gyp could be found.
A random thought.... I LMAO when Van Alden's "wife" creamed the Prohibition agent (thinking that the agent was gonna arrest her "husband").