Help? I can't figure this out.

[Larz60+]

replace all  code betweel try ... except with

with open(file) as f:
   line = f.readlines()
   if 'murder' in line:
       line = line.replace('murder', '------')
   ... do stuff with line ...

also remove for line in fhand:
and move the rest up to the ... do stuff ... line above