A former educational assistant at McNeil High School allegedly had sex with a second student several times, according to an affidavit obtained by KVUE on Tuesday.

According to the affidavit, Tyler Johnson, 20, had sex with a 14-year-old student at her Round Rock residence several times between October 2015 through February 2016. The affidavit states that Johnson did admit to having sex with her several times.

A separate affidavit alleges that Johnson had sex with a 15-year-old freshman student on the playground of Brushy Creek Elementary School in Round Rock.

According to court documents, Johnson had been going over to the freshman girls' home, and portraying himself as a 15-year-old student to her parent. Johnson was arrested April 13 after school officials learned about the relationships the previous day.

Students at the high school said they're shocked.

"Just kind of like the buzz you know, some people are like very shocked by it, some people are distraught by it, some people kind of make fun of it you know, you get everything," said senior Nathan Painter.

"It's weird, the guy looks like a kid, he could pass by, he blends in with everybody," said senior Vincent Leslie.

Unfortunately, some of the students say this is familiar.

"It's just a thing like wow, two instances in two years, that's pretty odd you know," said Painter.

"It's got to stop, it's unacceptable, it's childish," said Leslie.

A year ago, authorities arrested former McNeil teacher and coach Christopher Cotten - accused of a sexual relationship with a 16 year old student. Cotten pleaded guilty in March to felony charges of indecency with a child by sexual contact and an improper relationship with a student.

The students are worried their school will get a bad reputation.

"That could be a problem for future generations too, for like students that are transferring or coming from 8th grade, they'll be like well if this is happening in this school then we'll probably going to go to another one like round rock or Stony Point, or somewhere like that," said Leslie.

A district spokesman said they've taken a strong look at McNeil in the past week, and do not think this is indicative of common practice at McNeil high school. They said it's inexcusable.

The assistant began working at McNeil in August 2015 and the district said he served as an educational assistant for a small number of students.

Round Rock Independent School District said Johnson had passed a Texas Department of Public Safety background check and employment reference checks prior to employment. The school district said Johnson is no longer employed by Round Rock ISD.

Williamson County Jail records show Johnson is charged with two counts of sexual assault of a child, and two counts of improper relationship between an educator and student. His bond is a collective $300,000.