State law specifically requires a charge of second degree murder if the victim dies during the commission of one of the felony crimes specified by statute. These felonies include burglary, home-invasion robbery, kidnapping, sexual battery, and a number of other offenses. To establish second degree murder,
the prosecutor must show that the victim died as a result of an act committed by a non-participant in the felony. If the defendant or another criminal participant in the felony caused the unlawful killing, state law requires a charge of first degree murder rather than second degree murder. Florida uses this law to deter and punish unintended deaths as a result of felonious activities - See more at:
http://statelaws.findlaw.com/florida-law/florida-second-degree-murder-laws.html#sthash.WIHmvkvz.dpuf
The more I read the more confused I get.