Students’ answers | Before application % | After application % |
From fingerprints | 55 | 95 |
From DNA sample | 10 | 5 |
From gunpowder sample in her/his hands | 5 | 5 |
From blood | 30 | 55 |
From salivary and sperm | 5 | 10 |
From hair | 5 | 10 |
I don’t know | 25 | 5 |