The story was that Trump fired Comey because of a written report from Deputy Attorney General Rosensteim. Trumps account in the LA Times contradicts that:

“I was going to fire regardless of recommendation,” Trump said Thursday, repeating his intention a moment later.

Over the last two days, White House officials repeatedly had said Trump did not decide to sack Comey until after he met with Sessions and Rosenstein in the Oval Office on Monday.