Per Fox Sports' Jay Glazer (via CBSSports.com' Will Brinson), the Broncos believe the thief may have taken Miller's cleats and jersey after Super Bowl 50.
Ian Rapoport of NFL Media tweeted out more details:
Ian Rapoport @RapSheet
The man in question is Mauricio Ortega, whose paper will be releasing a statement shortly. https://t.co/NrYUGYw18I2017-3-20 18:00:41
This report comes after the NFL issued a statement announcing Brady's jersey had been found.
Glazer reported the NFL believes Brady's jersey "was stolen by someone posing as [an] international media member."
In the NFL's statement about recovering Brady's jersey from Super Bowl 51, it also noted his jersey from the Super Bowl victory over the Seattle Seahawks two years ago was found.
Miller led the Broncos to a victory over the Carolina Panthers in Super Bowl 50. He was named MVP of the game after recording 2.5 sacks and forcing a fumble that was recovered in the end zone by Malik Jackson for a Denver touchdown.