Are DNA tests done for all murder suspects?

DNA tests are not conducted for all murder suspects, but they are increasingly common in homicide investigations, especially when biological evidence is available at the crime scene. Law enforcement may prioritize DNA testing based on the circumstances of the case, such as the availability of physical evidence and the potential for a suspect to be identified through DNA. Additionally, legal protocols and resources can influence whether DNA testing is pursued in a particular case. Ultimately, the decision to conduct DNA tests depends on various factors, including investigative strategy and the specific evidence at hand.