The blood that was found at the scene was tested as Type B. Anna’s and Erica’s blood were both tested as Type B. To test the blood of the crime scene, Anna, and the persons of interest two different serums (Anti-A and Anti-B) were added to drops of blood from each sample. A “+” sign was recorded if there was clumping and a “-“ sign was recorded if there was not any clumping. If “- “followed by a “+” was recorded than the blood sample was type B. If “+” followed by a “-“was recorded than the sample was type A. If a “-“followed by a “-“ was recorded than that sample was type O. The blood was not matched to one specific person after this lab was
The blood that was found at the scene was tested as Type B. Anna’s and Erica’s blood were both tested as Type B. To test the blood of the crime scene, Anna, and the persons of interest two different serums (Anti-A and Anti-B) were added to drops of blood from each sample. A “+” sign was recorded if there was clumping and a “-“ sign was recorded if there was not any clumping. If “- “followed by a “+” was recorded than the blood sample was type B. If “+” followed by a “-“was recorded than the sample was type A. If a “-“followed by a “-“ was recorded than that sample was type O. The blood was not matched to one specific person after this lab was