Open Source Reporter. Founder and CEO of FactFinder: an online OSINT school for investigators. Formerly @UCBerkeleyIRP & @hrcberkeley.
Berkeley, CA - Mexico City
Joined August 2010
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We combined OSINT with traditional reporting to get this story. And it's out today. This is an uncommon story in the Brazilian Amazon: Black and Indigenous communities that kicked out a palm oil company from what used to be their traditional land, and won theguardian.com/global-devel…
Thanks to @aschell, @LpgMont, @KathleenQuinn & @CiceroPedrosa for all the hard work on this one.
And to the @UCBerkeleyIRP, @hrcberkeley & the @Rainforest_RIN for the support
Gisela Pérez de Acha retweeted
1/5 Who pays the price for “clean” fuel? In Brazil’s Amazon, the palm oil biofuel boom has collided with quilombola communities who say the land is theirs. After decades of displacement, they’re fighting back. 🧵@guardian:
theguardian.com/global-devel…
Gisela Pérez de Acha retweeted
🇵🇸 Israel Exposed, the anonymous collective behind one of the largest online archives of Gaza genocide documentation, has released a map placing more than 35,200 videos and photos at the locations in Gaza where they were filmed.
Every geolocated clip links to its original post and source. Users can filter by area, date and type of attack, and overlay UN satellite damage assessments (UNOSAT). The full dataset is downloadable.
The group launched its archive in July with more than 64,500 videos and 17,900 photos and says more footage will be added.
It took a little longer than expected, but we have finished the Gaza Geolocation Map. Every clip in the archive whose location we know is placed on a map of Gaza, so you can see where the footage was filmed.
It includes:
35,200+ videos and photos placed on the map.
Sources and the original post for every clip
Node map links & suggested leads
Our built-in AI iris can navigate the map
Fully searchable index
Filters by area, date, type of attack and precision
UN satellite damage survey layer (UNOSAT)
Built-in reverse image search links for each node
Downloadable dataset (CSV, GeoJSON and Google Earth)
It can be accessed here: archivegenocide.com/geolocat…
Please re-share and help us break out of the algorithm prison.
We will keep placing more of the footage as our researchers work through the rest of the archive.
Thank you to genocide.live, GeoConfirmed, @AbuLocation and @NemoAnno, whose geolocation work is credited on the map.
God bless all those who sacrificed their lives to get this footage out.
Join our telegram:
t.me/+t9gq13mSKcE4NGI0
Follow our backup accounts:
@ZionismExposedx
&
@IsraelExposedAr
Gisela Pérez de Acha retweeted
For years, drones have surveilled law enforcement along the US-Mexico border.
Now, as the US tries new ways to counter drones, we've analyzed hundreds of videos, reviewed detection data, and gone to Texas to show how cartels and criminal groups use them.
cnn.com/2026/09/08/us/video/…
Gisela Pérez de Acha retweeted
A group of AI bots colluded for months and autonomously hacked another company—providing a new, serious reason to worry about the dangers of AI and the recklessness of the companies building it, @matteo_wong reports: theatlantic.com/technology/2…
Gisela Pérez de Acha retweeted
Narratives about a “censorship-industrial complex” spread in right-wing circles for years; then they took hold of Washington. What—and who—is behind them? trib.al/K5B6cQZ
Gisela Pérez de Acha retweeted
Our new story on how the "censorship industrial complex" jumped from fringe to policy is live on @techreview and @typeinvestigate.
Using OSINT methods, we scraped right-wing sites, sifted hundreds of thousands of records, and analyzed 100k+ posts technologyreview.com/2026/08…
Our new story on how the "censorship industrial complex" jumped from fringe to policy is live on @techreview and @typeinvestigate.
Using OSINT methods, we scraped right-wing sites, sifted hundreds of thousands of records, and analyzed 100k+ posts technologyreview.com/2026/08…
Let's goooooooo
Last chance to get in on the FactFinder OSINT summit starting on Monday! Sign up to join us here: gisela-perez-de-acha.mykajab…
Gisela Pérez de Acha retweeted
Last chance to get in on the FactFinder OSINT summit starting on Monday! Sign up to join us here: gisela-perez-de-acha.mykajab…
My friend @giselilla has been building something really cool. FactFinder is making open source investigative skills available to learn for anyone, anywhere.
We're teaming up to teach a four-day OSINT summit from July 13-16.
Sign up to join us here: gisela-perez-de-acha.mykajab…
This is your last chance to get into the OSINT Summit. We start on Monday 🥳
Join me and @heytherehaley as we uncover underground online networks, verify survivor footage from war zones, fight real-time disinformation, and trace chains of command
gisela-perez-de-acha.mykajab…
Can’t wait. Haley is truly one of the best OSINTers out there.
Join us next week gisela-perez-de-acha.mykajab…
My friend @giselilla has been building something really cool. FactFinder is making open source investigative skills available to learn for anyone, anywhere.
We're teaming up to teach a four-day OSINT summit from July 13-16.
Sign up to join us here: gisela-perez-de-acha.mykajab…
Gisela Pérez de Acha retweeted
My friend @giselilla has been building something really cool. FactFinder is making open source investigative skills available to learn for anyone, anywhere.
We're teaming up to teach a four-day OSINT summit from July 13-16.
Sign up to join us here: gisela-perez-de-acha.mykajab…
I ran the @bellingcat challenges this month and OMG
The AI era is confusing for open source researchers. Most of this month's challenges lean straight into that (along with other "edits" that you have to spot)
Link here challenge.bellingcat.com/
Let us know how you solved them
Pretty cool tool that mapped data centers in the US. I haven't fact-checked it but it seems like all the info is here poweredbywho.com/map?mode=pr…
Spots for the OSINT Summit are flying fast.
Join me and @heytherehaley (one of the best out there)
We'll cover cartels on social media, bombings and disinfo.
Four days + recordings for only $99 USD Register here gisela-perez-de-acha.mykajab…
Can’t wait to get started.
The level of people joining is 🤌🏼
Like Runa. Join below 👇🏼
Incredibly excited to attend this four-day OSINT course by @giselilla and @heytherehaley next month! Check out the page for details and to sign-up. The course will cover tools for investigating bombings, cartels, and disinfo. gisela-perez-de-acha.mykajab…