Sheriff's officials say Flores was armed, though didn't specify with what, and that nonlethal efforts to subdue him, including a Taser, were unsuccessful. LaHood declined to say Tuesday whether Flores' arm motion was surrender.
"I don't know what his intent was," he said. "All I can tell you is the video is disturbing. But my encouragement to everyone is to press the pause button."
The most recent video was recorded by a witness closer to the incident, LaHood said, but he declined to provide further information about what it reveals or when authorities acquired it.
Flores' death is the country's latest law enforcement shooting to draw heavy scrutiny for using deadly force in a situation where it may not have been necessary. Law enforcement officials in the U.S. have expressed concern that the deadly confrontations have spawned retaliatory shootings of officers, including last week's death of a suburban Houston deputy at a gas station.
An investigation is underway to determine whether the deputies will face criminal charges or whether the danger to them was imminent, LaHood said. Deputies Greg Vasquez and Robert Sanchez, who were not equipped with body cameras at the time of the encounter, have been placed on administrative leave. Each has worked for more than 10 years with the sheriff's office.
"This is not going to linger on ... It will be dealt with as quickly as possible that comports with justice," he said.
Michelle Lee, a special agent for the FBI in San Antonio, confirmed Tuesday that "experienced civil rights investigators" are monitoring the investigation.
The deputies had responded to a domestic disturbance, authorities have said, and found a woman at the residence with a cut on her head and a baby who appeared to be injured. Sheriff's officials have not indicated whether they believe Flores harmed the two.
Attempts to contact members of Flores' family were unsuccessful Tuesday. They have previously referred questions to San Antonio attorney Thomas J. Henry, who has not returned messages seeking comment.
Bexar County court records show Flores was convicted in 2003 of aggravated robbery and the San Antonio Express-News reports he also has a conviction for assault with a deadly weapon.
U.S. Rep. Joaquin Castro, who represents part of the San Antonio area, said in a statement that Friday's shooting was "extremely disturbing."
"This incident is further evidence that police officers and deputies should wear body cameras," he said. "The widely supported technology brings transparency and accountability that protects law enforcement and civilians alike."
Bexar County commissioners approved a county budget Tuesday that includes more than $630,000 to provide deputies with body cameras and also cameras for patrol vehicles.
The Associated Press