Gunman scouted Florida grocery store before returning, killing 2

Royal Palm Beach Sheriff Ric Bradshaw said during a press conference that the shooting could have been stopped. The shooter had troubling posts on Facebook.
1:23 | 06/12/21

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Transcript for Gunman scouted Florida grocery store before returning, killing 2
We turn next to chilling new details after the deadly grocery store shooting. A grandmother and grandson shot. The grandmother trying to protect her child. So far it's not believed the gunman knew his victims but that warning signs were ignored. What was reportedly found on Facebook. Here's Victor Oquendo. Reporter: Tonight, chilling new details about the shooting inside a south Florida supermarket that claimed the life of a 1-year-old boy and the grandmother who fought to save him. The suspects enters the produce section and you can see he's looking towards the victim. Reporter: The sheriff's office says the alleged gunman, 55-year-old Timothy wall, shot the child first. The grandmother jumping in to stop him. She struggles with him, his gun jams. She was able -- he was able to overpower her down to the ground and he shoots her down while she's on the ground. Wall then turning the gun on himself. Reporter: The sheriff visibly angry, saying there were warning signs that were ignored. The real sad part of this, other than the fact that two people are dead, is that there was a chance this could be stopped. You know why? The reason is, he's on Facebook. He has said, I want to kill people and children. Reporter: And the alleged gunman -- and the sheriff's office also revealed the alleged gunman visited that same public store just two and a half hours before the shooting. There is still no known connection between the gunman and the victims. Victor Oquendo with us again tonight.

This transcript has been automatically generated and may not be 100% accurate.

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