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Call a 72-hour time line so we have a good understanding of what sort of activities preceded this accident. >> reporter: sources tell cnn rockefeller's phone records have been subpoenaed but based on a preliminary review, it's not believed the engineer was on his phone at the time of the dera derailment that killed four. among them, jim lovell who was commuting to work on sunday morning. >> my dad was not a victim. he was a loving father, great dad, best friend, uncle. i am so proud and blessed that i was able to call him my father. >> reporter: the ntsb says there's no indication of sabotage....

Eight of those attacks happened in maui. to put that into perspective, hawaii has traditionally averaged four shark attacks per year. there was only one recorded in 2008 and none in 1998. researchers at the university of hawaii have launched a two-year study to get to the bottom of why these attacks are surging. >> we have signs about one mile each way on the stretch from makena landing to the reserve. we're just closing the beach, monitoring, making sure everybody stays out of the water, keep it safe for the community. >> i think as divers, you realize, if anything, there are dangers, you kno...

About now, man is fishing in a kayak after the coast of hawaii and winds up being attacked and killed by a shark. this is the latest of recent attacks in the state by sharks. zoraida sambolin joins us with this story. a terrible ending to what should have been a great day. >> absolutely. so many of these stories. over the last 20 years, hawaii averaged four unprovoked shark incidents per year. this deadly encounter is one of 13 incidents in hawaii this year along. >> i was shocked. >> reporter: terror after a fisherman is killed by a shark. >> we realized something was wrong. >> reporter: the ...