SIDS most commonly happens to babies while in the crib while they're asleep at night.
But there have indeed been some cases of babies dying of SIDS while being held and even when in their car seats.
When a baby dies of SIDS there is usually no warning signs or any clear reason as to why the baby died and it happens in babies from 12 months and younger.
Babies that are 12 months or younger should always be put to sleep on their back to help prevent the occurrence of SIDS even though it can still happen but sleeping on their backs the baby has less of a chance of dying from SIDS.