Gang graffiti has been in Sioux Falls for years.
Police determined some tags from 2012 were gang related.
Former City Councilor Vernon Brown's house has been hit twice in that many years.
"I have no idea what that graffiti means, I know two years ago we got hit on the south side of our property and police said it was a gang sign," said Brown.
He reported the vandalism to police.
"Sometimes it's easy to determine if something is gang related and sometimes it's not. This one, after talking to the detective, it doesn't really look gang related, but that doesn't necessarily mean that it's not," said Sioux Falls Police Officer Sam Clemens.
He added they have a group of detectives who deal with property crime and graffiti.
"We do have a fair amount of graffiti, most of that has some type of gang element to it. There's certainly some that comes along that's not gang related," Officer Clemens explained.
Those detectives are very familiar with each kind of graffiti and can quickly determine if it's gang affiliated.
Officer Clemens said Sioux Falls does have gangs, but they're not as organized as they are in bigger cities.
"We have people that are in gangs and claim to be in gangs, whether they're not, if they want to consider themselves a gang member we consider themselves a gang member and treat them accordingly," he explained.
Office Clemens said it's important to clean off any graffiti as soon as you can, not only because you could be fined if it's still there after two weeks, but if you don't it could encourage rival graffiti or more crime in the area.