What percentage of bone weight comes from its mineral content?

According to the health monitoring device manufacturer Microlife, bones account for about 15 percent of total body mass in men. In women, bones account for roughly 12 percent of total body mass

                                                        water

a colorless, transparent, odorless, tasteless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

                                                        halon  

any of a number of unreactive gaseous compounds of carbon with bromine and other halogens, used in fire extinguishers, but now known to damage the ozone layer.

                                                  dry chemical

extinguishing agent used on class a, class b, and class c fires.

                                                  carbon dioxide

a colorless, odorless gas produced by burning carbon and organic compounds and by respiration. it is naturally present in air (about 0.03 percent) and is absorbed by plants in photosynthesis.

when comparing the cases, what similarities are there in the cases that suggest one person committed these murders?