A federal investigation of former Ferguson, Missouri Police Officer Darren Wilson did not find enough evidence that he violated the civil rights of 18-year-old Michael Brown.

USA Today noted that on Wednesday, two U.S. officials said that a federal investigation into the shooting death of the black teen did not yield enough evidence to charge Wilson.

Although an official announcement has not been made, The New York Times reported that federal prosecutors are in the process of drafting a memo not to bring civil rights charges against Wilson.

Benjamin Crump, attorney for the Brown family, chose not to comment until the Justice Department makes an announcement.

“We’ve heard speculation on cases before that didn’t turn out to be true,” said Crump. “It’s too much to put the family through to respond to every rumor.”

Brown was fatally shot by Wilson on Aug. 9 and as previously reported, a grand jury decided not to indict the former cop on state charges in November. That decision sparked public outrage and protests in multiple U.S. cities.

The latest decision is expected to be announced before current Attorney General Eric Holder leaves office in the next few weeks.