“Shaken baby syndrome” was a fad medical diagnosis in the 80’s and 90’s that has led to many miscarriages of justice (e.g. Sally Clark). It has subsequently been widely discredited by most of the Medical community, but that won’t stop some prosecuters…
A lot of SIDS where wrongfully classified as shaken baby and put blame on people around.
Of course shaking a baby is possibly lethal, just as removing the heart of babies during satanic rituals are lethal. None of that means that it is as prevalent as the then common zeitgeist among prosecutors and rumor mills. It’s always easier to blame individuals rather than realizing that it’s sometimes luck and sometimes memory manipulation
Edit: SIDS means Sudden Infant Death Syndrome, https://www.mayoclinic.org/diseases-conditions/sudden-infant-death-syndrome/symptoms-causes/syc-20352800