Dallas Mavericks owner Mark Cuban was accused of sexual assault after allegedly groping a woman who asked to have her picture taken with Cuban. The pictures were taken in a Portland bar in 2011, after which Cuban was interviewed by police, though no charges were filed due to a lack of evidence.
This investigation came to light thanks to reporting from Nigel Jaquiss of Portland alt-weekly the Willamette Week, reporting that deserves a ton of credit for unearthing the incident from nearly seven years ago.