Dzhokhar Tsarnaev , 21 , back in court today for start of defence case . Prosecutors last week urged jurors to push for the death penalty . Comment: Defence expected to suggest Tsarnaev was led astray by his older brother .
Dzhokhar Tsarnaev , 21 , back in court today for start of defence case . Prosecutors last week urged jurors to push for the death penalty . But poll finds majority of Massachusetts residents want life imprisonment . Defence expected to suggest Tsarnaev was led astray by his older brother .