Here is a possible concise summary of the text:
Kwili is a YouTube channel that narrates realistic stories and interesting topics. In this video, Kwili tells the story of Mary Vincent, a 15-year-old girl who was brutally assaulted and mutilated by Lawrence Singleton, a 51-year-old man who offered her a ride in 1978. Mary survived the attack and testified against Lawrence, who was sentenced to 14 years in prison but only served 8. He was released and later murdered another woman, Roxanne Hayes, in 1997. Mary testified again and helped to convict him of first-degree murder. He died in prison in 2001. Mary overcame her trauma and became an artist and a victims' rights advocate. Kwili ends the video with a message of caution and inspiration for the viewers.
Here are the key facts extracted from the text:
1. The text is a transcript of a YouTube video by Kwili, a channel that talks about realistic stories and interesting topics.
2. The video is about Mary Vincent, a woman who survived a brutal attack by Lawrence Singleton, a man who assaulted her, cut off her hands, and left her for dead in 1978.
3. Singleton was sentenced to 14 years in prison, but was released after 8 years and later murdered another woman, Roxanne Hayes, in 1997.
4. Vincent testified against Singleton in both trials and became a victims' rights advocate and an artist.
5. The video also contains an advertisement for Olymp Trade, a platform for online trading that Kwili claims to use and recommends to the viewers.