According to a police report obtained by the Dallas Morning News, a 911 call was made after family members showed up at Smith's North Dallas home and proceeded to "harass and torment" him "in the pursuit of collecting financial gain."
It was just the latest in a series of attempts to get money from Smith, sources confirmed Thursday after the situation was first reported by the newspaper.
Smith declined comment after Wedneday's practice at the team's facilities in Valley Ranch.
According to sources, family members have continued to ask Smith for money even after he gave them a large sum after he was picked ninth overall in the 2011 NFL draft and signed to a four-year, $12.5 million contract by the Cowboys.
Smith filed a protective order during the summer against his mother, Frankie Pinkney, and stepfather, Roy Pinkney, sources said. Smith has three sisters and two brothers, who also are prohibited from making contact with Smith on behalf of his parents.
Multiple sources told the Morning News that Cowboys security had to remove one of Tyron Smith's family members from the team's practice facility during training camp in Oxnard, Calif., about two hours from Riverside, where Smith's parents own a cleaning business.
Smith grew up working in the cleaning business with his mother and stepfather. After he was drafted, he talked lovingly of them, and the Cowboys mentioned how well he was raised.
Smith is being represented by Dallas-based attorneys Royce West and John Schorsch, who said the player was forced to turn to authorities to handle the matter.
"Lesser means were tried and they weren't successful," Schorsch told the Morning News. "You can use your own imagination as to what it took for a guy that big and that imposing to be that worried."
Schorsch told ESPNDallas.com Thursday that Smith is "a good kid. This is hard on him. But he's handled this with dignity and grace, I'm proud of the manner in which he's handled it."
Joe Panos, Smith's agent, declined comment.
"I think every player and every coach, really around this league, have different things going on in their lives and you just have to come into work and do your job as best as you can," coach Jason Garrett said Thursday, adding that he didn't see the issue affecting Smith.
Cowboys executive vice president Stephen Jones said Thursday: "He's handling his business. It's personal but Tyron is a man and everybody has things they have to handle personally and I have a lot of confidence he'll handle it."