In the case of a split jury, where half favor "guilty" and the other half favor "not guilty" on the initial vote, it is more likely that the final verdict will be this tendency is also referred to as the bias.

Not guilty, leniency

Explanation:

Split jury:

When the jurors are not able to reach to a decision than the decision is either held and presented before a new jury at some later date.

This is when the jury do not have a mutual consent on a verdict.

In the mentioned case if half the jurors favor 'guilty' and the other half are in favor of 'not guilty' then the final verdict is given based on leniency bias.

According to leniency bias in jurisdiction, if a verdict option on a trial is favored by substantial majority of the the jury members, lets say, two-third of the jury favors, then it is very likely for the jury to go with that for the final verdict.