From: jcs
In modern criminal investigations, DNA evidence plays a significant role in solving cases, including those that have remained unsolved for decades, often referred to as “cold cases” [01:59:00]. The case against Stephanie Lazarus, which went to trial 25 years after the victim’s death, illustrates the application of these advanced techniques [02:18:00].
Modern Investigative Techniques
Detectives in such cases utilize current forensic capabilities, including the collection and analysis of DNA. When interviewing a suspect, they may ask for a DNA swab, acknowledging that suspects are often aware of how DNA evidence is used in contemporary investigations [01:59:00].
During an interrogation, detectives may inform a suspect that it is “possible we may have some DNA at the location” where the crime occurred [02:04:00]. The purpose of requesting a DNA sample is to either identify or eliminate individuals from suspicion [01:54:00].
In one instance, when asked if she would be willing to provide a DNA swab, a suspect responded, “maybe” [01:08:00], and indicated a need to “talk to a lawyer” due to her understanding of how such evidence works as a law enforcement professional herself [01:59:00]. This highlights the awareness among suspects regarding the implications of DNA evidence in an investigation.