Recently an Italian journalist explained a great way of murdering your wife and avoiding prison:
1) Murder your wife
2) Go to the police station, surrender and confess.
3) Tell the police she offended you causing your overreaction.
You can now get bail before the trial because:
A) There's is not an escape danger(you surrendered).
B) There's not a risk of tampering with evidence or witnesses(you confessed).
C) There's not a risk of reiteration of the crime(you have not remarried yet...)
Waiting for the trial to start you are in house detention(1 year) but you can go to work. At the trial you face 30 years imprisonment. First your lawyer will show extenuating circumstances getting your punishment decreased to 21 years. Then because you were offended and provoked by your wife, the punishment can be lowered subtracting 1/3. Now the punishment is 21 minus 7 = 14 years.
And common extenuating circumstances are almost always given to the respondent, so 14 - 5 = 9 years. If you pay reparations to relatives of you wife your punishment is decreased and reach 6 years. Then if you ask for shortened rite the punishment is knocked down to 4 years. Since you stayed in house detention for 1 year you can subtract that time and get 4 - 1 = 3 years. Sentences of 3 years or less can be converted to social services work.
If you follow this system you should safely be able to murder your wife in Italy and not have to go to prison.