About four dozen trees in Danbury will be removed from along City streets because they could pose a falling risk.  The assessment and decision comes after a large tree fell and killed a passenger in a pick up truck on Padanaram Road on Tuesday.   Danbury likely isn't responsible for the tree that killed 45-year old Walter Cadenas Salinas, because Route 37 is owned by the state.  The Department of Transportation is looking into whether the tree was on private property or on the state's right of way.  The Danbury forestry division took down about 40 trees after the severe storm in May.  The Newstimes reports that the city assessors office said  it appears the property near where the tree was located is owned by Costwald of Danbury.  The developer plans to construct 37 single family units on property it owns near the brook.