Talking is the biggest danger for amateur criminals. If talking with police, talking is what is often their demise. They should listen what the police have as evidence and then form a prepared statement according to the evidence. When two people have murdered someone the only evidence is often pitting the murderers against each other. In those cases they don't need much evidence as they incriminate each other with detailed admissions. If none had talked they could have walked free. Sometimes little evidence is enough to win a case because of contradictions in the police interviews.