Twitter is doubling down on its commitment to opposing police use of its data for surveillance. The social network has severed its contract with Media Sonar, which produces surveillance software used by 19 local government agencies.

The social media giant cut Sonar off in October as part of its commitment to opposing the use of its data by companies that offer mass surveillance tools to law enforcement. Media Sonar was guilty of doing so, Twitter confirmed to the Daily Dot on Friday.

Media Sonar’s access to API, Twitter’s public platform for developers, was shut down, and Twitter told the Daily Dot that if they try to create more, “we will terminate those as well and take further action as appropriate.”

Media Sonar’s sales representatives pitched the cloud-based surveillance program as being “specifically designed for law enforcement” and their promotional material contains “an effective list of high frequency social media terms that can help identify illegal activity and threats to public safety.”

Get a warrant: Federal judge throws out evidence obtained through Stingray #surveillancehttps://t.co/2cc2lsDsNXpic.twitter.com/lwZMO804EW — RT America (@RT_America) July 13, 2016

A copy of their material was obtained by the ACLU who discovered that much of the terminology contained on the list pertained to anti-police brutality movements, such as Black Lives Matter. A separate column for Mike Brown-related keywords was included in the 2015 material.

The list also contained keywords of questionable quality. For example, under the gangs column, Media Sonar included keywords like “CEO,” “beat,” and “RIP.” All of these are words apparently can establish a user as potentially being up to no good.

Other interesting choices include placing “dissent” as a potential keyword for police evasion and crimes against police and “brother” as a potential keyword for human trafficking. Phrases that attract children are, according to Media Sonar, “IWSN,” which Media Sonar believes means, “I want sex now,” much to the chagrin of the Injured Worker Support Network.

Misunderstanding of youth culture aside, Media Sonar’s products were purchased by 19 local law enforcement agencies for at least $10,000 each between 2014 and 2016. The promotional material that the ACLU found was actually sent to the Fresno Police Department.

Media Sonar worked by using an artificial intelligence program to “analyze context, phrases and emoticons” “as predictive features” and was pitched as a way to “avoid the warrant process” to learn more about an individual’s social media profiles. Media Sonar also showed trends with individuals that ranged from the products they like to locations they are often tagged in.

Many feel that this kind of software should not be in the hands of law enforcement, because it would offer them the ability to track down and target protest organizers and activists. Twitter has expressed its “commitment to social justice” and claims to be on the lookout for companies like this.