Collecting Evidence
Take your time at each crime scene to collect crucial evidence and advance in the game. Most importantly, be thorough. Examine every item at the crime scene closely, including weapons, bodies, surfaces and statues. Close-up views of different items may reveal fingerprints, stains and other clues. Study and photograph victims' bodies to access personal belongings, markings, blood samples and other pieces of evidence. Open or unlock drawers and other places where evidence could be stashed. Check computers for files which could contain clues. Use the various high-tech forensic tools at your disposal to perform various tasks like chemical analysis, retrieving samples or making DNA comparisons. Combining some items can also have an effect.
Interrogating Suspects and Witnesses
Be persistent when questioning witnesses or individuals about a crime. Keep asking questions until the person says he knows nothing else; otherwise important testimonies might be overlooked. They may have important clues, such as phone numbers and names. Some will hold items that can be analyzed in the lab or computer disks with files. Other suspects might allow you to search the insides of their home or vehicle for evidence. Search for tire tread marks in cases that involve a vehicle. Take the suspect's fingerprints for lab testing if needed. Remember that you may need to revisit some characters more than once to obtain new information.
Analyzing Data
Take advantage of the Mobile Analysis Unit to study evidence recovered from the crime scene. A trace analysis computer, DNA analysis computer, a comparison microscope and an assembly table are among the high-tech tools at your disposal. Use each tool as needed to make comparisons or matches of things such as blood, fingerprints or tire treads found at a crime scene.
Search Warrants
Making a positive match with DNA, substances or powders found at the crime scene can result in a search or arrest warrant for a particular suspect. Try to obtain a search warrant from Captain Brass for a suspect's property if substantial evidence exists. Gaining entry into these places is necessary to move forward. When searching a home or vehicle, treat it as if it were another crime scene. Be thorough and take advantage of close-up viewpoints to find smaller, hidden clues.