Watson has been denied parole 13 times and remains in a California prison.
Smith has been denied parole six times since 2002, most recently in May 2012.
In January 1973 while serving a sentence of six months to 10 years, he was denied parole.
The same three were denied parole in 1997, and no one thinks it likely that the results this time will be any different.
One of the sons was denied parole last year, while the other is not yet eligible.
He has been denied parole twice, and will be eligible again in 1999.
He was denied parole, but comes up for consideration again in two years.
He was released on June 30 after being denied parole five times.
He, too, received a hearing last month and was denied parole.
She was denied parole for the second time in July 2012.