Kanchan Nath (58) died on Saturday after a coconut tree fell on her on a road in suburban Chembur.
Her husband Rajat Nath today submitted a complaint to the Chembur police against the concerned horticultural assistant of M-West Ward of the Municipal Corporation of Greater Mumbai, a senior police official said.
The police have registered a case of accidental death whereas this was a case under IPC section 304-A (death due to negligence), said Nath's lawyer S Balakrishnan.