Answer:
Do not mention the death when the child is present
Explanation:
At this point in time, the parents of the pre-school kid just died 3 days ago so it would be unwise to mention anything regarding the death of the kid's parents when the child is present. It is best you allow the kid forget naturally as any discussion about the parents would trigger the child's emotions.
Personally, I think don’t think they should. All of those factors(race, sex, culture) don’t have a big effect on intellectual ability. You can be high on the intellectually ability scale no matter race, sex, or culture.
Confirmatory Tests vary, and may be wrong from time to time. As time passes, the test is not as reliable as stated. If the so called "blood" is on a leather surface, blood isn't too prone to sticking to leather, so it may (or may not) be blood.