Nia Wilson's Sister Says Their Attacker Stared At Them While Wiping Off Knife After Stabbing

An Oakland woman has spoken out on the recent death of her teen sister.

Lahtifa Wilson and Nia Wilsonwere stabbed by John Cowell while transferring trains at the MacArthur BART station in Oakland, California late Sunday. Both sisters were stabbed in the neck but only Nia died. She was 18.

READ: Police Arrest Man Who Fatally Stabbed Oakland Teen Nia Wilson

Lahtifa, 26, recounted how the incident transpired while speaking with The Washington Post.

"All of a sudden, we transfer, just to get blindsided by a maniac," Lahtifa said. "She just yelled my name, 'Tifa, Tifa, Tifa,' and I said, 'I got you baby, I got you.'"

As she was caring for Nia, Lahtifa saw Cowell staring back at them while wiping off his knife.

"It's more reminiscent of a prison yard assault," BART Police Chief Carlos Rojas said. "They do their attack so quickly that before anybody can really react, the person takes off running."

Rojas also said that the attack "was, in my close to 30 years of police experience, probably one of the most vicious attacks that I've seen."

The 27-year-old Cowell has been arrested since the incident. On Monday night he was arrested about a dozen miles from the Oakland station where the attack took place.

A number of people have taken to social media to voice their support of the siblings and the rest of their family, including R&B singer and Oakland native Kehlani.

"Rest in peace Nia Wilson. praying for your sister to pull through and heal, and for her heart when she does. God bless your family. BART, you have cameras & thousands of passengers daily, you're being held accountable!!! this shit is wild. so young, super heartbreaking…," She tweeted.

Source: Washington Post