Former Regina high school teacher Jeffrey Dumba was back in court Monday morning.

Dumba faces five counts of child exploitation stemming from an alleged relationship between him and a student attending the school where he worked. The former teacher has pleaded not guilty to all charges.

Closing arguments were delivered in the courtroom, with both sides reiterating many of the details previously laid out in court.

Dumba was active on the social media platform, Snapchat. It was there that he began communicating with a 15-year-old student, which eventually led to an exchange of sexual images and messages between the two.

The argument lies in whether Dumba was aware of the girl’s age throughout the duration of their correspondence. The alleged victim claims to have made his age known to the 49-year-old man from the start of their communications. Dumba alleged the student told him she was a 20-year-old university student.

The defense argued that the 15-year-old had “searched” for the 49-year-old teacher.

The alleged victim had two different Snapchat accounts and usernames, the latter being her first and last name. Dumba’s username was different from his first and last, which he said made it difficult for students to find him on social media.

Closing arguments then indicated that the defense believed the alleged victim was lying about not knowing who the teacher was before communicating on Snapchat, describing the alleged victim as “a very convincing liar.”

“She presented herself as a victim after the fact, but that’s not what’s happening…I think it’s pretty clear that she felt good about what she did and that she was sort of bragging about the kind of relationship she had with Mr. Dumba.” said the defense.

The Crown argued Dumba failed to take reasonable steps to ensure the age of the alleged victim.

“She does not hide her identity from him if she interacts with him on Snapchat using the username (first and last name of the alleged victim) and if she sends him photos including photos of his face. (…) he knows people lie about their age on social media, because he lied about his age on social media.”

The judge will take the time to examine the question, before rendering his decision on November 26.