A weeklong investigation into a collection of anonymous Twitter accounts that captivated Philadelphia and the NBA for more than a week has determined that Bryan Colangelo, the Philadelphia 76ers president of basketball operations, was “careless and in some instances reckless” in safeguarding sensitive team information, Paul, Weiss, Rifkind, Wharton & Garrison said in a statement Thursday. Colangelo resigned Thursday, according to a statement from the team.

Paul Weiss found no evidence that Colangelo established or tweeted from a group of accounts that criticized, among others, current and former members of the 76ers; Colangelo’s predecessor in Philadelphia, Sam Hinkie; and his successor at his previous job with the Toronto Raptors, Masai Ujiri. The accounts also discussed private team information, as The Ringer detailed in a story May 29 that identified the accounts and linked them to Colangelo. The accounts, Paul Weiss found, were established and operated by Colangelo’s wife, Barbara Bottini.