Joseph P. Kennedy II said Sunday that anyone who kills for political reasons should "know that he will at a minimum spend life in prison without parole. "
Majority of slain presidential candidate's nine surviving children said they were "devastated" by the decision as two had pushed for his killer to be freed.
The second youngest of the nine Kennedy siblings, and the last surviving sibling died on Wednesday at 92.
Joe Biden compared the election of President Donald Trump to the "reawakening" that occurred among Baby Boomers after the assassinations of Martin Luther King Jr. and Robert Kennedy.
Ethel Kennedy, who has been an activist for social causes since her husband's assassination in 1968, has agreed to join 38 other Kennedy family members in the 24-day hunger strike.