'Sadistic': Kindergarten teacher Frederick Mena, 25, is accused of digging his nails into a young student's skin in class because he wanted to see her cry . A kindergarten teacher from Miami has been charged with aggravated child abuse after police say he dug his nails into a girl's hand and leg just to see her cry. Frederick Mena, 25, was arrested earlier this month in connection to the sickening incident that allegedly took place March 5 at Silver Bluff Elementary School in Coconut Grove. According to an arrest report, Mena was teaching math to a kindergarten class when the victim, a young girl, became stymied by the material. In his frustration, according to the Miami Dade School Police, Mena dug his fingernails deeply into the child's hand and calf, breaking the skin and leaving marks. The reports states that Mena later admitted to the incident in a letter penned to the principal of the school. According to the 25-year-old's written confession, cited by NBC Miami, he injured his student because ‘for some reason,’ he had the urge to see her cry. He reportedly wrote that instead of resisting that violent urge, he decided to 'go with it.' Mena added that the child in question was too ‘sensitive,’ and he thought that inflicting pain on her might ‘toughen’ her up. Place of learning: On March 5, Mena was teaching math to a kindergarten class at Silver Bluff Elementary School in Coconut Grove, Florida, when he became frustrated that one of the students was not grasping the material . But in the end, he admitted that he hurt her to ‘plainly satisfy an ugly pleasure.’ Once the deed was done, the 25-year-old educator said he felt no emotion and no regret, reported WSVN. ‘Knowing myself and who I truly am deep down I’m just shocked thinking that I actually did this!’ he reportedly stated, according to Miami Herald. When questioned by police, Mena allegedly admitted that he wanted to take advantage of the kindergartner while she was at her lowest, and that he desired to 'punish her' and 'put her down further.' The Miami-Dade School District released a statement saying that Mena has been removed from the classroom, terminated and banned from ever working for the district again. Vicious: Mena confessed in a letter that he got the uncontrollable urge to see the child cry and put her down . Mena has been charged with felony aggravated child abuse with great bodily harm. He is being held on $10,000 bond. A judge has issued a stay away order to keep the disgraced teacher from the victim. In a social media post from 2014, Mena was described as a first-year teacher. According to his online presence, Mena has been splitting his time between teaching kindergarten and pursuing a career in hip hop.
Miami teacher Frederick Mena, 25, charged with aggravated child abuse . He penned a confession letter saying he became frustrated with the victim in class and wanted to 'punish her' and 'put her down'
Mena claimed he thought hurting the child would 'toughen' her up and later felt no regret .