Devon Still child support - The Cincinnati Bengals defensive tackle has been accused of falling to pay child support for his cancer-stricken child since August 2014.

This Devon Still child support revelation came to light on Tuesday via a letter written by the child's mother - Channing Smythe - to NFL vice president Jeffery Pash. Parts of the letter have been published in the New York Daily Mail.

The Devon Still child support claim is for his four years old daughter Leah, who was diagnosed with a rare form of pediatric cancer called neruoblastoma in June. She was honored during a Bengal game earlier this month.

"I don't think it is fair that Devon Still, who is Leah's father, has refused to pay any child support for her for the months of August, September, October and November of this year," Smythe wrote. "I have an outstanding medical bill for Leah for an ambulance for her. I have been unable to pay the ambulance bill, and it is not covered under insurance, if I were receiving child support for Leah I would be able to pay this bill, but since Leah's father is refusing to provide child support I am unable to pay the bill for the ambulance."

She urged the NFL to conduct an investigation into whether Devon Still child support negligence amounts to a breach of the league's Personal Conduct Policy.

The NFL and the Bengals have not officially commented on the Devon Still child support negligence accusation. However, the player has released a statement where he categorically denounced all the accusations.

"My daughter's battle with cancer has been inspirational to many all over the world. When she gets older, I want her to be able to look back and read about her positive impact on the world, not about the private issues her parents were going through. I am not going to retaliate against the mother of my daughter, and the untruthful report in the New York Daily News article, by criticizing her character. I am going to continue to allow the court system to handle this matter, as it has been doing these last couple of months," he said.

According to USA Today, Smythe says she has had to quit her job due to Leah's illness. She claims her daughter's battle with cancer requires full time attention.

The Devon Still child support negligence claim is a negative development that doubtless neither him nor the Bengals would be least happy with. Since Leah's illness became public earlier in the year, the Bengals have donated a part of the proceeds of Still's jersey sales to the pediatric cancer research. The Bengals have sold over 14,000 jerseys and donated about $41.25 million to the cause thus far.