Thirty minutes after death, several changes begin to occur in the body. One of the most noticeable is pallor mortis, which is the paleness of the skin due to the cessation of blood circulation. This happens within 15-30 minutes after death.
Additionally, livor mortis, the settling of blood in the lower parts of the body, starts to become visible within 20-30 minutes after death. This causes a purplish discoloration of the skin, which becomes more pronounced over time.
Rigor mortis, the stiffening of muscles, starts to set in within 2 to 6 hours after death and reaches its peak around 7 to 12 hours. While rigor mortis may be present by the 30-minute mark, it will not be fully established yet.
These changes, along with the initial stages of decomposition, are all part of the natural process of the body breaking down after death.
