Presumptive tests for blood at crime scenes are called __________.Question 15Select one:a.Litmusb.Catalyticc.Prepatoryd.Glycohemaglobine.All of the above

Which evidence should be collect first at a crime scene?Question 5Select one:a.Wet biologial material such as blood or semenb.Largestc.Smallestd.Fragilee.None of the above

Blood stain pattern evidence is often present at crime scene. The shape and distribution of blood evidence can assist and investigator in reconstructing the crime scene.Question 21Select one:TrueFalse

Test to determine whether blood is of human origin or not:Question 93Select one:a.Precipitin testb.Takayama testc.Teichmann’s testd.Wagenhaar test

A items of clothing that contained a blood stain should be _______ before it is packaged.Question 4Select one:a.air driedb.placed in direct sunlightc.submerged in distilled vinegard.carefully dried with a warm blow dryere.None of the above

ScenarioIt is 1987 and a teenager has been left caring for a 2-year-old child while her parents go out for the evening.  With the child settled for the night the teenager heads downstairs for a chat on the phone with her boyfriend.  When she next heads upstairs to check, she finds the child is missing from his cot and the family dog is whimpering lying in a pool of what appears to be blood.Serology (6 marks)What test could you use in situ to determine if the substance really is blood? In your own words explain why?  (2 mark)Are there any possible shortcomings of this test?  In your own words explain why/ why not? (2) Back in the lab what else could you do to determine if the substance really is blood and whether or not it belongs to the missing child or the dog? Explain the basis of the test(s) (2)Scenario continuedOn the night the child was taken the first responders thought they could smell something funny on the breath of the babysitter and suggested she may have been intoxicated.  A breathalyzer revealed a BAC of 0.03.  The authorities requested further toxicological analysis to determine the condition of the carer on the night.Toxicology Results Consider the toxicology results from the table below. Toxicology Report                                                                           Patient Id 24625431Report issued 8/8 1987                                                              Age: 17 Y    DOB 18/07/1970                                                                                                                Gender: femalePositive findingsCompoundResultUnitsMatrix SourceCaffeinePositiveMcg/mlBloodEthanol0Mg/dlBloodBlood alcohol concentration0.00g/100mlBloodOther than the above findings, examination of the specimens submitted did not reveal any positive findings of toxicological significance.Toxicology (12 marks)what do the findings suggest about the carers condition on the night? In your own words explain/justify your answer (2 marks)Other than the concentrations found - indicate 2 more things that would assist the toxicologist in interpretation of the anomaly between the breath reading and subsequent blood analysis and in your own words explain why?  (4 marks)Discuss whether the initial blood alcohol concentration result is a false positive?  In your answer you should explain this term and consider what may have impacted the results that should be taken into consideration by the toxicologist when considering this possibility. (4 marks) In your own words explain whether a hair sample might tell us anything that would assist in this case? why/why not? (2)