How long could the Lindsay Clancy jury remain deadlocked?

The jury in the Lindsay Clancy case has reported being deadlocked, unable to reach a unanimous verdict regarding the killing of her three children. Following this announcement, the judge ordered the jury to return to deliberations to continue their work. This development increases the possibility of a mistrial, drawing comparisons to the Karen Read trial, which also concluded with a hung jury after extensive deliberations took place within the Massachusetts courthouse system.