Stage 2: Putrefaction - 4 to 10 days after death
Putrefaction begins; gases produced by anaerobic bacteria; considerable bloating; seepage of fluids;
Larval activity speeds up decomposition - the smells and body fluids that begin to emanate from the body attract more blowflies, flesh flies, beetles and mites.
The later-arriving flies and beetles are predators, feeding on maggots as well as the decaying flesh. They are joined by parasitoid wasps that lay their eggs inside maggots and later, inside
Stage 3: Black putrefaction - 10 to 20 days after death
Abdominal wall is broken and carcass deflates
By this stage, several generations of maggots are present on the body and some have become fully grown.
They migrate from the body and bury themselves in the soil where they become pupae.
Predatory maggots are much more abundant at this stage, and the pioneer flies cease to be attracted to the corpse.
Predatory beetles lay their eggs in the corpse and their larvae then hatch out and feed on the decaying flesh.
Parasitoid wasps are much more common, laying their eggs inside maggots and pupae.
Stage 4: Butyric fermentation - 20 to 50 days after death
All the remaining flesh is removed over this period and the body dries out. It has a cheesy smell, caused by butyric acid, and this smell attracts a new suite of corpse organisms.
The reduction in soft food makes the body less palatable to the mouth-hooks of maggots, and more suitable for the chewing mouthparts of beetles. Beetles feed on the skin and ligaments. Many of these beetles are larvae. They hatch from eggs, laid by adults, which fed on the body in earlier stages of decay.
The cheese fly consumes any remaining moist flesh at this stage, even though it is uncommon earlier in decay.
Мумификация
При определенных условиях начавшееся гниение может приостановиться за счет быстрого высыхания трупа. Такое явление носит название мумификации. При благоприятных условиях (сухость воздуха и достаточная вентиляция) наступает полное высыхание, при этом вес мумифицированного трупа составляет около 1/10 первоначального. Мумификация возникает обычно при нахождении трупов на чердаках, при захоронении их в сухих крупнозернистых и песчаных почвах, в хорошо вентилируемых склепах и т. п. При прочих равных условиях скорость развития
мумификации зависит от массы тела. Для полной 
мумификации трупа взрослого человека требуется 6— 12 месяцев. В состоянии естественной мумификации трупы сохраняются долгое время. 
Mummification Conditions
1- Temp. environ : 50 – 55 C (bacteria died ) more 80 C destroyed, still C
2- Moisture : less than 30 % ( Dry)
3- Air flow , Ventilation is sufficient
Mummification
It Faster in |
Children |
|
Elderly |
|
Cachectic |
It needs 2 – 3 months to be completed.
It starts within 1month
It finished within 1 year
Artificial Mummification
It is passive mummification
1- Medical Method
2 - Dry Method
3 - Liquid Method
1- Medical Method
Injection of
Anti Bacterial substances in
Arteries
Veins
Cavities
Skin surface