Two separate Des Moines murders are unsolved and another open case is being investigated as a homicide. They all happened in the last few weeks.
The Polk County Sheriff's Office doesn't deal with unsolved homicides very often.
"It's been several years since our last one, so this is something out of the ordinary," said Sgt. Jana Abens of the Polk County Sheriff's Office.
The shooting that killed one man and injured another outside of Big Earl's Gold Mine early Sunday morning came as a surprise.
"No suspects right now, we have talked to several witnesses though," said Abens. "We're asking that anybody with information, even if it seems like a small amount of information, to contact Crime Stoppers."
Des Moines police are dealing with similar frustrations in the case of a man who was shot and killed outside of Oakridge Apartments on April 15.
They're also investigating a man found dead in the Riverbend neighborhood last Thursday.
"They're frustrating to us," said Sgt. Steve Woody of the Des Moines P.D. "Just because they're still an open case, quite often detectives have a good idea of who committed the crime, but there's simply not enough evidence there or the witnesses haven't come forward in the manner that the county attorney wishes for them to testify in court."
Right now officers are doing everything they can to get these cases solved. They say it all starts with help from the community.
"You always know that somebody out there knows something," said Abens. "The frustration lies when we either can't identify somebody who has a piece of information that could be vital to us, or maybe that person doesn't realize that's the piece of information that we could connect other things to and lead us down the right road."
Anyone with information can relay that to police anonymously through the Polk County Crime Stoppers. The phone number is 515-223-1400.