A Briton stabbed his wife at least 100 times, after researching on internet sites like "How to kill someone" and "Top 10 tips on how to commit the perfect crime", a court has heard

Alfredo Merigo, 43, stabbed his wife with a steak knife as their two-year-old son sat near them in a chair. He later left his 40-year-old wife Linda dead on the driveway, the Sheffield Crown Court was told.