Marilou Danley (above with Stephen Paddock) said he was 'unable to perform'

The final police report of the Las Vegas shooting has revealed that the gunman's girlfriend told investigators that he was 'unable to perform' and that sex left him 'exhausted'.

The investigative report published on Friday offers little insight into shooter Stephen Paddock's motives in the October 1 shooting that left 58 dead, but does shed light on his personal life.

Based on interviews with his small circle of acquaintances, the report describes Paddock, 64, as an aloof narcissist, uninterested in politics or religion, who developed heavy obsessions with any hobby he took up before quickly losing interest and dropping it entirely.

Out of the witnesses interviewed, most insightful on Paddock's habits and eccentricities was girlfriend Marilou Danley, 63, who was cleared of involvement in the massacre.

Danley, a Philippines native who later became and Australian citizen before moving to the US, met Paddock in Reno, Nevada, where she was working as a high-limit casino host.

Paddock would often visit Reno and stay at Danley's casino, where he was known as a high roller. Over the course of several years, their relationship developed from professional to romantic.

Out of the witnesses interviewed, most insightful on Stephen Paddock's (left) habits and eccentricities was girlfriend Marilou Danley (right)

Paddock eventually bought a condo in Reno, and in 2013 Danley moved in with him.

In 2015, Paddock convinced Danley to stop working so that they could travel together more. Though she was resistant at first, she eventually agreed to quit her job and accepted a monthly amount of money from him.

The couple took many cruises and international trips together, including vacations to the Mediterranean, the Bahamas, Dubai, and Asia.

While Danley is a practicing Catholic, Paddock described himself as an atheist, and would often say things such as 'your God doesn’t love me' and tease her for making the sign of the cross. However, she said he had no problem with her taking part in religious practices.

While Danley said their relationship was 'very romantic' in the beginning, 'she noticed a gradual decline in affection,' according to the report.

Paddock blamed his declining health. He claimed to have a 'chemical imbalance' and often complained of being sick, telling Danley that 'doctors couldn't cure him', the report stated. He also told her to stop wearing perfume and makeup, claiming he was allergic to them, and frequently wore cotton gloves and complained of headaches from 'chemical smells'.

Paddock's primary care physician, who last saw him for an annual checkup about a year before the massacre, said that the only major ailment he'd treated him for was a muscle tear related to a fall several years ago. The doctor, who was not named in the report, said that he suspected Paddock may have had bipolar disorder, however Paddock refused to discuss the subject, and seemed fearful of medication.

People run from the Route 91 Harvest country music festival after hearing gun fire. The new report does not offer a motive for the attack, but sheds light on Paddock's personal life

Over the course of Danley and Paddock's relationship, 'hugging and kissing stopped', the report says. When Danley confronted him about the issue, he told her he was 'unable to commit to more affection'.

Eventually, Danley told investigators, 'Paddock was no longer able to have an intimate relationship because he was unable to perform,' the report states. Investigators would later find hundreds of images of child pornography on Paddock's computer.

'Danley told investigators Paddock was physiologically able to have sex, but the physical act would exhaust him. Danley stated he would often sleep for long periods after physical exertion,' the report says.

About a year before the massacre, Paddock began stockpiling firearms. His relationship with Danley began to change, she recalled, becoming more businesslike, and she became 'almost subservient' to him.

'He began purchasing semi-automatic rifles and hundreds of gun-related items almost daily,' the report says.

Danley though that Paddock's fascination with firearms was just a hobby. The report notes that Paddock typically 'heavily invested, monetarily and emotionally, in any activity he began.'

An evidence photo shows Paddock's hotel room as police found it after the shooting massacre

'He obtained his pilot’s license and at one point owned an airplane. He learned to scuba dive and bought all required gear and equipment,' investigators said.

But, the report notes: 'With most of his hobbies, Paddock would quickly lose interest and sell any related equipment.'

About a month before the massacre, Danley and Paddock stayed together in the Mandalay Bay, the hotel he would later use as his sniper's nest to open fire on a crowded outdoor concert.

'She observed Paddock constantly looking out the windows of the room which overlooked the Las Vegas Village venue,' the report says. 'Paddock would move from window to window looking at the site from different angles.'

Several weeks before the massacre, Paddock told Danley she should visit her family in the Philippines. She left on September 15 and they communicated mostly by text and email for the next two weeks.

When Paddock transferred $150,000 into her bank account to buy a house in the Philippines, Danley became convinced that he was about to break up with her.

The grounds of the Route 91 Harvest Festival are seen from the smashed-out window of the Mandalay Bay room that Paddock fired into the crowd from

She learned of the attack while she was in Manila. Her sister called to tell her to come home, and when she arrived her driver's license photo was on the television, listed as a person of interest in the worst mass shooting in modern US history.

After firing into the crowd at the Route 91 Harvest festival with multiple semi-automatic rifles modified with bump stocks, killing 58 and injuring hundreds, Paddock placed a .38 caliber Smith & Wesson revolver in his mouth and pulled the trigger, ending his own life.

None of Paddock's acquaintances could supply a motive for the shooting. He rarely discussed politics, though Danley recalled he had occasionally expressed dislike of the Obama administration and approval of President Donald Trump's plan to stop illegal immigration.

Paddock was not religious and expressed no racial bias, friends and family said. Danley described him as mild mannered, rarely becoming visibly upset and never acting violently.

Paddock's brother Eric theorized to investigators that he had committed the massacre 'because he had done everything in the world he wanted to do and was bored with everything.'

'If so, Paddock would have planned the attack to kill a large amount of people because he would want to be known as having the largest casualty count,' the report said.

'Paddock always wanted to be the best and known to everyone.'