All the following is true about Kevorkian sign except.
Kevorkian sign / cattle tracking sign

It is the earliest change in eye after death.
Blood in the retinal vessels appear fragmented, visualized in opthalmoscope.
It apppears with in few seconds to minutes after death and persists for an hour.
Persist even after 3 years of death
Appear within minutes of death
Visualized using opthalmoscope
Cattle tracking sign