Jane Roh posted a message on Friday that reads, "There's something about this picture, can't quite put my finger on it..." spelling out the color 'white' with a 'Q' in front.
Roh is referring to the image she attached, which shows a rally 'against' her boss, DA Larry Krasner.
- 'End victim blaming': Protesters gather outside of Philadelphia District Attorney Larry Krasner's office
The city's Fraternal Order of Police sent a letter to Krasner's office Wednesday, demanding answers.
Officials want to know if the tweet was posted with a government-funded device, if Roh was on the clock when she made the post and if the tweet is in violation of work policy.
The DA's office has not responded.