One of the four victims in Sunday night's fatal helicopter crash in Houston has been identified as Cesar Lerma. Lerma was one of three passengers and the pilot aboard the doomed helicopter that was taking a night tour over downtown Houston when it crashed into a radio tower in the Second Ward and spiraled into a ball of fire before crashing.

The NTSB says they have obtained the records of the pilot involved in Sunday’s deadly helicopter crash in Houston’s East End.

NTSB says they are in the early phases of their investigation into the deadly helicopter crash and collecting evidence from the scene in Houston’s Second Ward.

There’s no immediate explanation for how this could happen to an experienced pilot who had picked up patients at the location near Owen County High School before.

The investigation spans an area of at least 4 acres, Houston Police Department Lt. Jonathan French told reporters on Monday. Power outages were reported in the area, Houston Mayor John Whitmire said Sunday. No residents were injured or vehicles damaged on the ground, French also said.

Officials surveying the aftermath of a deadly helicopter crash in Houston on Sunday are looking into the possibility that the aircraft struck a radio tower because its warning lights were not working.

The National Transportation Safety Board (NTSB) will continue its investigation into a Second Ward helicopter crash into a transmission tower that killed four people on Sunday evening.ABC13 learned there is a history of concern about the aviation obstruction lighting - the red flashing lights at the top - on the tower located at Engelke Street and Ennis Street.