WAKEFIELD — A Hopkinton woman reported to Rhode Island State Police that a Newport man with whom she was having a relationship began to threaten her with the release of explicit photos when she attempted to break off the relationship.That man, Keith P. Quinn, 53, of 121 Prospect Hill, Newport, stood before 4th Division District Court Judge Madeline Quirk Thursday charged with felony extortion/blackmail and cyber-harrassment.The victim contacted troopers at the Hope Valley barracks earlier this week reporting that Quinn said he would release explicit photos and videos unless she continued to their relationship. The threats, police said, were made through text messages.Quinn was arrested at his home on Wednesday, where police also seized photography equipment, computers and correspondences. Also taken was a small amount of marijuana, for which Quinn was issued a summons to appear at the Rhode Island Traffic Tribunal on Oct. 15.“An initial review of this evidence supports the complainant’s allegation,” said Col. Steven G. O’Donnell, in a statement released Thursday. He said the computer crimes unit would conduct a forensic examination of the evidence.Quinn was held overnight at the Hope Valley Barracks Wednesday, but following his appearance in Washington County was going to go to Providence Superior Court on a violation of probation charge for allegedly failing to appear for a restitution review on a charge of obtaining money under false pretenses.Quinn has no other criminal background. As he attempted to explain the reason for the violation to the judge, Quirk explained he should not say anything about his circumstances at that particular time.Trooper Richard Swanson suggested bail be set at $30,000 with surety for Quinn, meaning he would have to come up with $3,000. Judge Quirk noted Quinn’s lack of a criminal record and his lifelong ties to Rhode Island in setting his bail at $30,000 personal recognizance. Quinn did not have to post any bail money. A domestic no-contact order was issued with the alleged victim. Quinn said he was sure he would have no contact. A screening date of Nov. 22 was scheduled.