A Denver police officer and a woman arrested in connection with a sexual assault investigation will not be charged, authorities said Friday.

Officer Davin Munk, 31, and Angiella Arnot, 47, have been released from custody, a police news release said.

Denver police say the development is “based on new evidence that was obtained during the course of this complex investigation.” Officials did not elaborate.

Investigators say an internal affairs investigation will determine if Munk violated any police department policies. He remains suspended, now with pay, pending the review’s outcome of the internal investigation, the release said.

Det. Mary McIver, a police spokeswoman, said Friday she could not comment further on the case because it remains under internal investigation.

Munk was being held in lieu of $650,000 bail at the city’s downtown jail in the case. He has worked for the department since 2013 and was most recently assigned to a post in northeast Denver.

An investigation into Munk began after police were contacted by another Colorado law enforcement agency on Monday about an alleged sex assault that happened in Denver in late April.

“After receiving the information from the outside agency, Denver police contacted the alleged victim, who provided a statement regarding the incident,” police said in a statement.

An arrest warrant for Munk was issued after the alleged victim’s interview, and he was taken into custody on Tuesday night.

Authorities have declined to release court records in the case.

Munk has faced discipline several times over his career, including a four-day unpaid suspension in February 2015 for providing inaccurate information about an assault in a report, records show.

He was also issued a written reprimand for a January 2015 incident in which he carelessly handled city property and was counseled in April 2015 over his ability to obey department rules.

There is also a pending internal investigation into an allegation made against Munk of inappropriate force in December 2015, according to his disciplinary file.

Jesse Paul: 303-954-1733, jpaul@denverpost.com or @JesseAPaul