The following are the general steps that are followed if a suspect's blood is found at a crime scene:
Blood is collected from the crime scene using sterile techniques and specialized equipment.
The collected blood sample is stored and transported to a forensic laboratory for analysis.
The blood sample is analyzed to determine the blood type and DNA profile of the suspect.
The blood type and DNA profile of the suspect is compared to the blood evidence found at the crime scene.
If the blood evidence found at the crime scene matches the blood type and DNA profile of the suspect, it is considered strong evidence against them in court.
Other forensic techniques, such as serology, microscopy, and chemical tests, may be used to further analyze the blood evidence and strengthen the case against the suspect.