Among the many worrying statements for Donald Trump to come from his former attorney Michael Cohen’s sentencing today was the following: Cohen gave “credible” and “valuable information” about “any links between a campaign and a foreign government.”

The statement came from Jeannie Rhee, a prosecutor in special counsel Robert Mueller’s office, which is currently probing links between the 2016 Trump presidential campaign and Russia.

Rhee was reportedly tight-lipped about what exactly Cohen provided. “There’s only so much we can say about the particulars at this time, given our ongoing investigation,” she said, according to Courthouse News, adding that “Mr. Cohen has sought to tell us the truth.”

We already know at least one link: Trump and Cohen tried to meet Russian president Vladimir Putin in Sept. 2015, as revealed by a footnote buried in a memo Mueller’s office published last week. However, Rhee’s reticence to divulge anything today suggests there’s more to be revealed. So does former Cohen lawyer Lanny Davis’s promise today that Cohen will soon “state publicly all he knows.”