Unfortunately it doesn't work that way. Psychopaths sort of pop up seemingly out of nowhere... Though there is the passed-on-down genetic factor to consider. If this is so, then the more children a psychopath produces greater than the sum of +1, the higher the chance for more psychopaths after their death, than before.
John McCain is survived by his Mother Roberta, his ex-wife Carol, his wife Cindy and his seven children and four grandchildren.