Livor Mortis and Algor Mortis

A 55-year-old man is brought to the mortuary 72 hours after death. On examination, the body shows dark discoloration of the skin, particularly over the abdomen and chest. The pathologist notes that the discoloration blanches on pressure in some areas but not in others. Which of the following best explains this finding?

During a post-mortem examination of a body found in a cold storage room maintained at 4°C, the examiner notes that body temperature has dropped to 18°C, 24 hours after death. Which of the following is the commonest factor that causes delayed algor mortis in such scenarios?

A 68-year-old woman is discovered dead in her bedroom. The body is cold to touch, and the ambient room temperature is 15°C. The forensic team needs to estimate the time since death using body temperature. Which investigation is most appropriate for accurate determination of algor mortis in this case?

A 52-year-old male is found dead in his apartment after 36 hours. The body shows fixed livor mortis on the dorsal surfaces and areas of contact with the floor. The forensic pathologist suspects the body was moved post-mortem. Which investigation is most appropriate to confirm displacement of the body after death?

A 52-year-old woman is discovered dead in her home. The body shows purple-red discoloration over the face, neck, and upper chest in a dependent distribution. On examination, the discoloration does not blanch on pressure. The ambient temperature is 25°C, and the rectal temperature is 28°C. Which single feature best distinguishes algor mortis from livor mortis in this case?