KWPD did the local investigation. They did the interviews, collected the evidence, got the DNA ran. FDLE apparently executed a search warrant which provided more information. KWPD interviewed the suspect but before the DNA results did not have enough evidence to make an arrest. The suspect left town. Once he traveled out of state, then yes, the US Marshal helped with executing the arrest warrant along with local officers in Waukesha Wisconsin. There are certainly times to criticize the KWPD, but this is NOT one of them. Some people just have an agenda they use every opportunity to blindly advance.