Sally Clark High School Presentation Data Management

presentation sally clark

1. The Sally Clark Case Sam Wang , Kaushik Chatterjee, Edward Wang

2. ABOUT SALLY CLARK INFORMATION Sally Clark, English Solicitor, at Addleshaw Booth & Co (1994-1998) ARREST DATE Arrested on February 23rd 1998 alongside husband (Steve Clark) CHARGES Prosecution dropped husbands charges CRIME Killing her son Christopher in 1996, and Harry in 1998 02 01 03 04 01 02 04 03

3. ABOUT THE VICTIMS Christopher Unresponsive and died en route to hospital December 13th, 1996 Harry Found dead in cot on January 26th, 1998 01 02

4. Christopher Unresponsive and died en route to hospital December 13th, 1996 Harry Found dead in cot on January 26th, 1998 ABOUT THE VICTIMS Christopher Unresponsive and died en route to hospital December 13th, 1996 Harry Found dead in cot on January 26th, 1998 01 02 Evidence of Trauma Evidence of Trauma

5. TRAUMA EXPLANATION Resuscitate Trauma is unknown , like from attempting to resuscitate Alone She was alone on both occasions Save them Attempted to save them, and act quickly SIDS Tragically both children died due to SIDS (Sudden infantile death syndrome)

6. 1 in 73,000,000 Odds of having two SIDs deaths in your family

7. 1 in 73,000,000 Assumes that two successive deaths are independent Victim of the Prosecutor's Fallacy, misrepresentation

8. Expert witness: Professor Kaushik Chatterjee Testifying on the flawed statistical testimony regarding SIDS deaths, that are misrepresented by the prosecution

9. SOCIAL ECONOMIC GENETIC FACTORS 1 in 60-130

10. COMPARATIVE STATISTICS 2x SIDS DEATH 4 red marbles 1 in 20 2x HOMICIDE 2 blue marbles 1 in 120 Red Marbles Blue Marbles >

11. IN-DEPTH ANALYSIS Probability of the second child dying of SIDS GIVEN the first child has died of SIDS Results in a reduced denominator Counting cases of Sids death Much more complicated than just squaring the probability of one child dying from SIDS

12. Stable relationship Not smokers Relatively affluent Both boys Why 1 in 3000 and not 1 in 8500? 1 1300

13. Wore a red shirt Murder suspect Not a murder suspect Did not w e ar a red shirt 1. Wore red, given that they are a murder suspect = 1/4 2. Murder suspect, given that they wore red = 1/6 1. 2 .

14. Thanks