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Malachy Browne
1/ Here the steps we took and tools we used for our investigation mapping how the Las Vegas shooting unfolded
A look back at our Emmy-winning audiovisual investigation into last year’s deadly mass shooting in Las Vegas.
The New York Times The New York Times @nytimes
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Malachy Browne Oct 23
Replying to @Storyful @APVideoHub
2/ First, search across social platforms for eyewitness videos of that night. Also use newswires and . We gathered 40.
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Malachy Browne Oct 23
3/ Include police bodycam video provided by and police and fire scanner audio provided by
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Malachy Browne Oct 23
4/ Organize and annotate the footage by location: front, rear and wings of the festival venue, on the streets outside, at the Mandalay Hotel
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Malachy Browne Oct 23
5/ Together, the footage conveyed the horror and brutality of the assault from multiple locations. But the chaos it showed needed structure.
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Malachy Browne Oct 23
6/ Annotated the bursts as I watched. The length, interval, pattern. Awful as they were, they became a scaffolding to build a timeline
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Malachy Browne Oct 23
7/ Verify burst patterns by lining up the burst audio waveforms. Note the bullet spikes, patterns and pauses in these different videos
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Malachy Browne Oct 23
8/ Repeat this process and create a complete timeline of the assault using 30+ videos from first bullet to final volley
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Malachy Browne Oct 23
9/ This proved there were 12 main bursts of fire outward from the hotel, some relentless in frequency, and three intervals of over 1 minute
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Malachy Browne Oct 23
10/ Verify video locations, e.g. this filmed in taxi at Mandalay Hotel. Clues are street lights by street entrance and distant Luxor Obelisk
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Malachy Browne Oct 23
11/ This particular video, taken right below the gunman, filmed loud bursts of fire and a dull burst (40 secs in)
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Malachy Browne Oct 23
12/ Because we had a full timeline, we noticed this as an outlier. No camera filming at the festival during this time picked it up.
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Malachy Browne Oct 23
13/ This & analysis by indicated shots fired inside. Possibly at sec. officer & hotel engineer taking cover in hallway
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Malachy Browne Oct 23
14/ That scaffolding of a multi-location video timeline gave us a detailed picture of what was happening around the venue between bursts
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Malachy Browne Oct 23
15/ Moving on: By marking the time displayed in clocks at several points through the footage, we could approximate WHEN the firing began
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Malachy Browne Oct 23
Replying to @malachybrowne
16/ Some people seeking the story link: You may also like these: &
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Malachy Browne Oct 23
Replying to @malachybrowne
17/ Back to the start time. Eyewitnesses sent me original videos. Installed phone app to extract EXIF data for video start time: HH:MM:SS
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Malachy Browne Oct 23
Replying to @LVMPD
18/ Mark the video times, including vid, on the timeline. Sure, clocks can be off, but 6 of them point to a 3-second starting window
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Malachy Browne Oct 23
19/ Next, the bullet count. showed me how he did this piece with and .
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Mark Twomey Oct 23
Replying to @malachybrowne
This is serious work malachy well done. Next stop FBI
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