Which of the following actions is a best practice when dealing with active crimes?

Sending evidence for forensic testing is considered a best practice when dealing with active crimes because it ensures that crucial physical evidence is analyzed scientifically, which can provide valuable information. Forensic testing can include analyzing DNA, fingerprints, ballistics, or digital evidence, all of which can be instrumental in establishing links between suspects and crimes, corroborating witness statements, or exonerating innocent individuals.

This process is vital in building a solid case that will hold up in court. By utilizing forensic resources, law enforcement can enhance the integrity of the investigation and leverage expert analysis to support their findings. This approach demonstrates a commitment to thorough and professional investigative practices, ultimately working toward justice for victims and accountability for offenders.

In contrast, the other actions listed do not align with best practices in criminal investigations as they undermine the thoroughness and effectiveness of the investigative process. For example, conducting interviews without following up could result in missing critical information, while stopping evidence collection once leads are established could overlook additional evidence that might emerge. Likewise, avoiding providing victim support services detracts from the obligation to support and assist victims during a traumatic time, which is a crucial part of the law enforcement's role.