Inventio (Defence)
Sextus Roscius was accused
of patricide (killing your father). This was the worst crime to commit
in Rome and was punsihable by death. Cicero suggested that Roscius
neither wanted to nor had the opportunity to kill his father, that
Roscius did not have the depraved and vicious nature required to carry
out such an act, that Roscius did not have the means to nor could get
anyone else to kill his father. Cicero also used Erucius who could prove
that Roscius was on good terms with his father who had never intended
to disinherit him.