The Manhattan district attorney's office subpoenaed the social network company after it initially refused to provide the identity of the user, whose Twitter handle is @obamamistress.
New York City police confirmed today they had been given the information on the person who made violent threats to audience mambers attending former heavyweight champion Mike Tyson's one-man show on Broadway, The New York Post reported.
Fox News said the tweets included: "i'm serious, people are gonna die like aurora."
Also: "gosh i'm still making this hit list damn i wanna kill a lot of people."
Before complying with the subpoena, Twitter had told the NYPD in an email, "We appreciate the timeliness and sensitivity of this matter, and have reviewed the reported Twitter account.
While we do invoke emergency disclosure procedures when it appears that a threat is present, specific and immediate, this does not appear to fall under those strict parameter as per our policies."
The NYPD boosted security outside the Longacre Theater on Broadway after the threats.