A jury has found a Michigan mother guilty of involuntary manslaughter for failing to stop her son from carrying out a deadly school shooting. Jennifer Crumbley‚ 45‚ is the first US parent convicted of manslaughter over a mass shooting carried out by their child. Prosecutors accused her of being negligent in allowing her son to have a gun‚ and ignoring warnings signs. Her husband‚ James‚ is facing a separate trial on the same charges. He has pleaded not guilty. Their son‚ now 17‚...