In the coming days, the office of NFL commissioner Roger Goodell will announce whether Kansas City Chiefs wide receiver Tyreek Hill violated the league’s Personal Conduct Policy. If a violation is found, it would mean that Hill engaged in conduct detrimental to the integrity of, or public confidence in, the NFL. Such “conduct detrimental” would reflect the possibility that Hill was in some way responsible for suspicious injuries suffered by his three-year-old son earlier this year, or that Hill undermined the league’s image upon media publication of a recording in which Hill tells former his fiancée, Crystal Espinal, that she needs to be “terrified” of him, or both.
The Hill situation is among the more difficult personal conduct policy decisions for Goodell, whose choices on conduct matters have often generated controversy and occasionally spawned federal lawsuits. With Hill, an incomplete set of facts coupled with ambiguous family circumstances are beyond the capacity of Goodell to clarify. If Goodell offers factual conclusions about how Hill’s son was injured, Goodell would be vulnerable to criticism that he overreached and possibly interfered in an on-going legal matter.
https://www.si.com/nfl/2019/07/15/tyreek-hill-roger-goodell-possible-suspension-decision-chiefs
It's anyone's guess. My guess is 4-6 weeks.