Thomas Berry, 66, was hit at Ninth Avenue and West 29th Street, officials said.
The predawn fire started in a store near West 29th Street.
Ian Clement told the Dershowitz family he was "sorry" for Marilyn's death.
Video of Marilyn Dershowitz's fatal bike accident shows inconsistencies in the driver's story.
Manhattan postal truck driver Ian Clement is accused of hitting and killing Marilyn Dershowitz.
Alan Dershowitz said prosecutors finally allowed him to see video of his sister-in-law being hit by a postal truck while she rode her bike.
Alan Dershowitz reportedly said the DA is not helping his family investigate his sister-in-law's death.
Marilyn Dershowitz, who was hit and killed while riding her bike, will be laid to rest at Riverside Memorial Chapel.
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