The Diamonds crooner was sitting court-side next to Soboroff at the game when he asked to take a selfie with her wearing an LAPD wristband to show her support for the officers. After the singer agreed and suggested she take the picture, she accidentally dropped the phone on the floor breaking its screen.
Rihanna autographed the broken phone -- which still works in spite having a smashed screen -- and later apologized to the police chief via Twitter.
"Sorry I broke your phone @SteveSoboroff :)," she wrote Tuesday night, adding that she'd make a "special announcement" that evening.
Later Rihanna announced she'd be making a donation to the foundation and was allowing the phone to be auctioned.
The broken iPhone with the singer's signature is currently for sale on eBay. All profits from the sale will benefit the LAPD cadete program and the Los Angeles Police Memorial Foundation.