NORTH HAVERHILL — A Dartmouth College alumnus took the stand in his own defense at his sexual assault trial on Thursday.

Kyle Clampitt flatly denied that he raped a Dartmouth freshman on the roof of a fraternity house nearly three years ago.

Clampitt maintained the encounter between him and the then-18-year-old student that occurred in the early morning hours in April 2022, was consensual and at no time did the woman protest or fight back.

“Did you do the things you are accused of doing?” Robin Melone, one of Clampitt’s two defense attorneys, asked Clampitt at the outset of his testimony, which came on the fifth day of his trial in Grafton County Superior Court.

“No,” Clampitt replied.

It was the first of repeated denials as Melone read a list of sexually and physically violent acts he is alleged to have committed on the rooftop as a party wound down in the wee hours of April 24, 2022.

Clampitt, 26, is charged with 12 counts of aggravated felonious sexual assault and two counts of second degree assault. Each of the sexual assault charges is punishable with 10 to 20 years prison if convicted.

Clampitt’s attorneys called him to the witness stand Thursday after prosecutors rested their case. The state’s last witness on Thursday was a DNA expert from Florida who testified remotely. Under cross examination, the expert said the presence of DNA alone does not indicate whether sex between a couple was consensual or not.

The woman who has accused Clampitt was the first witness to take the stand on the trial’s opening day last Friday.

She testified in graphic detail about being raped and strangled by Clampitt. She told a jury of 10 men and three women about how she had met Clampitt during a party at the Theta Delta Chi fraternity when he invited her up to the rooftop to “see something cool.”

It was then the assault occurred, the woman testified.

Afterward, the woman testified that she approached a fraternity member in whom she confided about the alleged attack.

The fraternity member also testified earlier in the week, along with two friends the woman confided in the next morning.

Clampitt, a former member of the college’s lacrosse team, was back in Hanover that weekend for the final home game of the 2022 season.

On Thursday, Clampitt wore a navy blazer, khaki colored pants, white shirt and blue tie.

Clampitt testified that he and the woman had sex on the rooftop. But he denied nearly every detail of the alleged victim’s version of events, including holding her down against her will, “dragging” her to the metal rail, and choking and strangling the woman.

Amanda Jacobson, the assistant Grafton County attorney who is leading the prosecution, challenged each of Clampitt’s denials in her cross examination.

Jacobson cited the testimony of witnesses who recounted what the alleged victim had related to them the morning after.

Jacobson took Clampitt line-by-line through his testimony, which was a near polar opposite account as that of his accuser.

The alleged victim sat with family members, a longtime friend, and victim advocates in the front row on the prosecution side of the gallery during Clampitt’s testimony. A group of Dartmouth student supporters filled the seats behind her.

Clampitt was not on the witness list submitted by his lawyers at the outset of the trial. The defense early on during pre-trial motions notified the court that it might rely upon a so-called “defense of consent” in countering the criminal charges.

Earlier this week, a Dartmouth Hitchcock Medical Center nurse who conducted a physical examination of the woman after she came to the emergency room with friends the next day documented the bruises, abrasions and lacerations on the woman’s body, according to testimony.

During cross-examination, the nurse acknowledged the injuries also could have occurred in a consensual encounter.

Closing arguments by prosecution and defense attorneys are expected to be presented on Friday morning. That will be followed by Superior Court Judge Jonathan Frizzell’s instructions to the jury about how they are to weigh the evidence in reaching a verdict.

Contact John Lippman at jlippman@vnews.com.