A day before the newly crowned Bundesliga champions take on Barcelona in the first leg of a Champions League semi-final, Hoeness told the Munich Merkur newspaper on Monday that he would let the dust settle before discussing the issue.
"I will let a few weeks go by before I say anything," he told the local newspaper. "But I will legally defend myself against the excesses in some media coverage. It will be really expensive for them."
The prosecutor's office in Munich confirmed the probe which has made the front pages in the media across the country for the past two days and triggered mixed reactions from politicians across all major parties.
Hoeness, former European champion and World Cup winner with West Germany, is the public face of one of the world's richest clubs, having served as a successful player, general manager for 30 years and then club president since 2009.
