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Investigators tracked her last known residence to an address where she worked the streets. “She was living with a man there,” Johann said.  The crime scene might lead them to the killer. “There was also some physical evidence left with the body that we were able to recover,” Johann said.  “It’s basically DNA,” he said, adding it could be the key to capturing the killer.  Johann did not say what kind of DNA was collected.   Johann said detectives took DNA samples from at least eight people who could have been involved in her death. “We compared them (samples) to DNA left with the body,” he said. “No matches.” What authorities call a “cold DNA hit” may lead to an arrest. For example, a drop of blood from the suspect is left on the carpet padding that Renville’s body was wrapped in. Investigators collect the blood. The sample is stored in a databank.  If the suspect is arrested for an unrelated crime and submits a DNA sample, authorities can get a DNA match from the stored sample of blood. “I feel that if someone is capable of doing something … like this, he is not going to stop acts of violence,” Johann said. “I feel they will be arrested sometime down the road. I feel whoever committed this crime that there’s a good chance down the road he’s going to be exposed through a DNA hit.” Investigators zeroed in on the blanket, also.  Police posted pictures of the blanket in the northeast Kansas City area. They released the photos to the news media. But it led to zero leads.  “We never got one bite,” Johann said.  The long-time detective said he’s been in several houses in the northeast area on investigations since the Renville murder.  “I’ve seen some blankets very similar to this one,” Johann said. “So apparently it’s pretty common.” The killer stole her cell phone, Johann said, and made around 50 calls, each lasting about a minute, never speaking during the calls. “I think they were random phone calls,” Johann said. “We went and contacted each person who was called. Nobody had any idea.” Police think the killer did this to throw off investigators, knowing detectives would have to follow up each call.  “I think four of us spent a couple of 16-hour days doing this,” he said. “We had to do this. When somebody gets murdered, you don’t want to leave any stone uncovered, just on the slim chance that one call could break the case wide open.” “We followed a ton of leads at first, and it’s gone dry ever since,” Johann said. “When you carry an open homicide case, it’s always there in the back of your mind. Even when the leads have grown cold. But you always have your eyes and ears open. If a similar murder happens, let’s say in Kansas City, you always make a call and see if there’s similarities or links.”  Renville was a native American who lived on a reservation in South Dakota. She was a member of the Sisseton-Wahpeton Sioux tribe. Her great-great grandfather was chief of the tribe.  Renville met a man from Kansas City on the Internet and left the reservation in her mother’s car.  She came back only for holidays, Watts said.  “I had an eerie feeling after she left us” after a holiday, Watts said. “I’ve been praying a lot ever since.”