Robert Thomsen looks back during his trial for extortion at Hillsborough County Superior Court in Manchester on Wednesday.

MANCHESTER — A jury convicted a Manchester man Thursday on attempted extortion but cleared him of criminal threatening charges in connection with a hospital clinic bomb threat.

Robert Thomsen, 46, of 260 Blucher St., will be sentenced in Hillsborough County Superior Court Monday on the Class A felony conviction that carries a state prison term of 7½ to 15 years.

Thomsen was found guilty of demanding $20,000 in cash from the Elliot health system or threatening to go with the media over false claims his doctor had sexually harassed his wife.

Assistant County Attorney Donald Topham said it’s too early to determine what prosecutors will recommend for punishment in this case.

“We have to talk to the witnesses and the victims before we form a recommendation,” Topham said.

Thomsen was also charged and acquitted on the three felony charges stemming from the bomb threat called in last Nov. 14 to the Derryfield Medical Building at 275 Mammoth Road.

The jury deliberated for about an hour over two days before returning their verdicts.

Prosecutors accept the jury’s judgment, Topham said.

“We work for the jury; they represent the people of Hillsborough County and we appreciate the time they put into this case,” Topham said.

Thomsen’s defense lawyer, Julian Jefferson, had told the jury his client had no intention of carrying out any threats.

On that November day, Thomsen placed several calls to the clinic but Jefferson hammered home throughout the trial the person who called in the bomb threat did not identify himself.

Office receptionist Mariah Burleigh testified Thomsen said he knew the kind of car his doctor drove and where he lived.

She took the bomb threat call and testified it “sounded like” Thomsen because he had called the clinic several times earlier that day.

Topham assisted in this case and noted it was Assistant County Attorney David Jenkins’ first trial.

“He did an incredibly thorough job and the people of Hillsborough County are very fortunate to have him,” Topham said.

Jefferson said Thomsen had told staff he was bothered at how the doctor “touched” his wife’s hair, back and arm whenever he had an office visit.

But Jefferson said his client told authorities his wife was not bothered by the contact with his doctor and that it was only his concern.

“It’s sad but it’s not criminal,” Jefferson said.