Casper's dictum refers to -
Caspers dictum states that a body decomposes in air twice as rapidly as in water and eight times as rapidly in eah. Dr. Narayana Reddys Synopsis of Forensic Medicine & Toxicology 27 th edition pg. 86.
Rate of putrefaction
Rigor mois
Rate of cooling of body
Greenish discoloration of another abdominal skin
Death and postmortem changes