His body was recovered on Tuesday in the Mississippi River.
Offensive messages were spray-painted on the exterior of the building.
Someone daubed a Swastika and 'Trump 2020' on the sign.
Police are hunting those responsible.
A brick building at Washington Park is covered in graffiti.
The school's principal confirmed the graffiti in an email to parents.
Revo's graffiti spree left thousands of dollars in damage.