Medical Jurisprudence, Forensic medicine and Toxicology. Vol. 1 by R. A. Witthaus et al.

9. Presence or absence of rigor mortis.

To give any value to this point it is necessary for the witness to observe the nature of the substance upon which the body is lying; whether the body be clothed or naked, young or old, fat or emaciated. These conditions materially influence the rapidity of cooling and the onset of rigor mortis.