ST. LOUIS (AP) – A new study suggests that a community’s affluence plays a role in determining a person’s municipal court experience.

Saint Louis University conducted an exit poll of 753 people leaving courts in 13 St. Louis County municipalities. Results were released Tuesday. The St. Louis Post-Dispatch reports that the poll found that both black and white residents had a far better experience in communities where the median income level was higher.

However, black defendants generally had a worse experience than whites.

Municipal courts in the region have been under scrutiny since the unrest that followed the 2014 police shooting of Michael Brown in Ferguson.