But he never exchanged a word with them, according to Latifah Wilson.
Ebony Monroe, a cousin of the victims, initially said the third sister, 21-year-old Tashiya Wilson, had been injured but authorities later said it was Lahtifa. "I don't know, he just gave me a feeling in my stomach".
Speaking outside a relative's home, Letifah Wilson, 26, said that she and her sister were returning home from a family event when they were "blindsided by a maniac". The attacker then followed the women off the train at the MacArthur station when he stabbed them on the platform in what appears to be a random attack.
A day before the Wilson sisters were stabbed, Don Stevens, 47, was "cold-clocked" on the side of his head by an unidentified man after he got into an argument with another person on the train, Rojas said.
At around 8:00 a.m. Monday a KTVU crew watched police recover a large knife from a construction site under Highway 24 along the MacArthur BART access road.
In a statement, Mayor Libby Schaaf send her condolences to Nia's family and addressed the fears the attack might have been racially motivated.
'Up to this point we don't have any information that was race-motivated, but we can't discard it, ' Rojas said. VIDEO: "'Stand down": "BART stabbing victim's godfather makes plea to black community " He just felt upon himself to take his anger or whatever the case may be out on innocent women", Wilson continued.
Nia's mother was there, and was consoled by family, friends and a community of support.
Allums said social media accounts that state that they are raising money for Wilson's family are "fake accounts" and he asked people not to contribute to them. Lahtifa Wilson was later released from the hospital.
She was "spunky, feisty, loved to dance", she said. As for her own injuries, Wilson has stitches in her neck. Still she's focused on Nia.More news: Woman gives survivors flowers at boat memorial
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'I want justice for my daughter, ' he said, with his eyes welling up with tears, seemingly in disbelief.
BART officials released that image and another one from surveillance video that shows him at MacArthur station Sunday night dressed in a white and gray sweatshirt and carrying a backpack. Officers say they followed up on tips from the public and found him on an Antioch-bound train.
BART Police Chief Carlos Rojas called the series of deaths "an anomaly" at a Monday press conference, saying the attacks are the "highest priority" for transit police, reported KPIX. Officers were able to take Cowell into custody.
Following his swift attack, the suspect took off running before anyone in the station could react and fled through the BART parking lot, the chief said.
A man who identified himself as the father of the victims showed up to the scene Sunday night.
"We don't know if this is racist". She has known Cowell since he was a child.
"We have two subjects with two lacerations", a man says over loud background noise and people yelling. He also had prior arrests in Alameda County, as well as warrants out for his arrest, the East Bay Times reported.
Then he was sentenced to prison for robbery and after serving two years, was out on parole four months ago.
The viciousness of Sunday night's stabbing still stuns veteran police officials. "We haven't connected him to any type of radical group or white supremacist group or anything like that", Rojas added.
The suspect attacked the sisters Sunday night as they left a train at the Bay Area Rapid Transit's MacArthur Station in Oakland.