The city attorney in San Francisco is up in arms about a graffiti case involving pop star Justin Bieber’s latest album. The AP reports that Dennis Herrera is demanding that Universal Music Group, Bieber’s music publisher, cooperate in an investigation into sidewalk graffiti promoting the album, “Purpose.”

In a letter to UMG, Herrera reportedly wrote that public works crews have been running up a tab as they work to remove the graffiti, which appears to be spray-painted.

The report quotes Herrera’s letter saying: “This prohibited marketing practice illegally exploits our city’s walkable neighborhoods and robust tourism, intentionally creates visual distractions that pose risks to pedestrians on busy rights of way, and irresponsibly tells our youth that likeminded lawlessness and contempt for public property are condoned and encouraged by its beneficiaries.”