Kavanaugh repeatedly admitted drinking beer during his committee testimony, pushing back against some members' questions about just how much he drank. It's not known whether Dudley was ever charged with a crime.
Mitchell argued that that there were inconsistencies in accuser Christine Blasey Ford's narrative and said no one has corroborated Ford's account.
Ramirez has reportedly spoken with the FBI as part of its investigation.
Kavanaugh was described as "belligerent and aggressive" by Ludington, who said he would provide the Federal Bureau of Investigation with information "detailing violent drunken behavior by Kavanaugh in college". He said he felt it was his "civic duty" to tell people about his experience drinking with Kavanaugh. Instead, the police report shows that Kavanaugh and four others were questioned by police - but not arrested.
Sen. Jeff Flake (R., Ariz.) said Kavanaugh's nomination would be "over" if it was proven he lied during his testimony before the Judiciary Committee.
His statement contradicts another Yale classmate - former National Basketball Association player Chris Dudley - who told The Washington Post he "never, ever saw Brett Kavanaugh black out" from alcohol consumption.
Ludington said that Kavanaugh had played down "the degree and frequency" of his drinking, and that the judge had often become "belligerent and aggressive" while intoxicated. "This is not a man who said that he was ideal with respect to alcohol".
What is the FBI investigating?
Ludington told the Washington Post that when Kavanaugh drank, he was often aggressive. Ford, who testified before Congress last Thursday, said Kavanaugh assaulted her during a drunken high-school party in the '80s.
Mr Kavanaugh denies the allegation.
"We're trying to figure out if it's him", he said. Judge has also denied misconduct allegations.
Ali Campbell, the guy Kavanaugh thought he assaulted. He accused Democrats of politicising the process and harming his family and good name.
A newly obtained, unredacted version of the report states Dudley "was transported to Union Ave detention facility by prisoner conveyance." and a large "A" on the report indicates Dudley was arrested, according to New Haven's police chief Anthony Campbell. Dudley stressed that while he and Kavanaugh drank together in college, he never saw Kavanaugh black out. "Along with our other suite-mates, I not only socialized with Brett, but I was there with him at the end of the night when we came home, and there in the morning when we got up".