I’ve reviewed many a case where a first responding LEO needed some of this information. Especially the Time of Death (TOD) graphic showing the 0-36hr rigor events. More information on this is available here. Livor mortis gets a pass.

Here are specific TOD cases where things got jammed up because of poor training and police guesswork.  Blood Pattern Analysis (BPA) and some other topics are included and assuredly sound accurate and reliable. Sometimes yes and sometimes not so much.

From the Forensic Nexus