"Mom's rage and rhetoric escalestes and her letter writing campaign gets much worse", said Detective Raymond Cote, of the Nassau Police Department.
This rage begun when her son, who was trying to make a travel team with the East Meadow little league, failed to make the team last fall and again last month.
"She's now sending letters directly to the coach and the family, threatening them", Cote said.
Police revealed that officials of the little league, which play their games in this east meadow complex, also received letters.
Parents like Frank Pitone, whose son Kyle played in the league for several years, is surprised by the charges.
"It's kind of a shame, if it's true," Pitone said.
No one answered the door at Chiauzzi's home after she had been released on bail.
But while investigators say the letters were written to make it sound like they came from another person, the tone clearly grew more threatening.
"I will personally make it my goal to make sure you and your family will suffer dearly. You will rot in hell soon", Detective Cote read from the letters.
Chiauzzi is also accused of sending another frightening letter, directly to the coach's 14 year old son. It read in part, "Think about it, if something terrible to your dad or mom or your sister you can blame your dad for not taking my threats seriously."
Former players say the league has always been very competitive, but they have heard of anything like this before.
"I can't believe it. I can't take it that far", said Mike Favuzzi, a former player.
"It's surprising", added Nick Cavallino, a former player.