National Weather Service meteorologist Phil Grigsby estimated early Wednesday that 15 to 20 inches of rain had fallen in Pensacola in the past 24 hours.
Ryce's parents tried to alleviate the pain of the tragedy by pushing for laws regarding confinement of sexual predators and working to improve police procedures in missing child cases.
The prosecutor's office also discovered Walker had been mistakenly released. Walker was convicted of second-degree murder in the 1999 Orange County slaying of 23-year-old Cedric Slater.
A gunman holding hostages inside a South Florida apartment complex killed six people before being shot to death by a SWAT team that stormed the building early Saturday following an hours-long standoff, police said.