The first sign that a decision process was emerging was when:

Question $5$ options:

A$)$

When Juror $8$ said he would change his vote if no one changed their vote in a secret ballot.

B$)$

When Juror $8$ demonstrated the duplicate knife.

C$)$

When Juror $3$ broke down about his son.

D$)$

When Juror $4$ realized that the old lady had sight problems.