In retrospect, the girl says, Quinn was confused and probably "felt stuck" in the relationship with Brock.
In an e-mail Quinn wrote to his girlfriend's mother following the discovery that he was having a sexual relationship with Susan Brock, he writes, "[It's] obvious you have uncovered my darkest secret that I have been trying to forget about for a very long time, but I really need you right now. I can't share this with anyone besides you all . . . This is very unfair. I wasn't able to see [your daughter] unless I played by [Susan Brock's] rules, and I was afraid [your daughter] would dump me if I didn't see [her]. I am begging you."
However, by the time Quinn had written the e-mail, he had "mastered the art of manipulation, deceit, and denial, which were taught to him by Susan Brock," according to Brock's pre-sentencing report.
Before he ever was sexually abused by Susan and Rachel Brock, and about the time adolescence started to kick in, Paul Quinn was having what his parents would later describe as "mental meltdowns."
At the time, they figured the "meltdowns" were the result of the troubled relationship between Quinn and his girlfriend.
Over the course of about five years — beginning before the sexual liaisons started — the Quinns took Paul to several counselors. The Quinns never brought to the attention of Paul's psychologists the possibility that he was getting sexually abused by Susan Brock, despite their bringing those very concerns to leaders in their church more than a year before Brock's arrest.
A psychologist who worked with Quinn in the months before Brock's arrest told Chandler Detective Chris Perez that Quinn had "learned to manipulate."
In police reports and transcripts of conversations with his jailed wife, County Supervisor Brock repeatedly refers to Quinn as "that little Dorian Gray," a reference to the young, hedonistic pleasure-seeker with loose morals whose beauty infatuates an older man in the Oscar Wilde novel The Picture of Dorian Gray.
Toward the end of their affair, Susan Brock described herself as Quinn's "personal slave," and the Quinns acknowledged that they had "no doubt their son began manipulating Ms. Brock."
After it was revealed that Quinn and Brock had been sexually involved, Brock threatened to kill herself on several occasions. She promised her young victim that she would change her will and give Quinn $300,000 after her death so he could "go to college and become the best lawyer ever."
Days later, during a call recorded by the Chandler Police Department, Brock told Quinn she'd "taken too many pills and was starting to scare herself."
Quinn then asked whether she yet had changed her will to ensure that he would get the money.
When Fulton Brock launched his 2008 campaign for county supervisor, he enlisted the Quinn family to help.
According to elections records, three members of the Quinn family were paid $8,730 by "Friends of Fulton Brock" during the 2008 campaign for doing services such as putting up campaign signs and collecting signatures.
Paul, records show, was paid $1,660 for setting up, repairing, and removing campaign signs. Laura Quinn was paid $3,422 for collecting signatures. These types of paid campaign jobs often are reserved for the closest friends and family of a candidate.
To be sure, the Quinns and the Brocks were very close — their kids went to school together, they were involved in similar social activities, and they often shared dinners and holidays.
By 2009, though, the two families were at odds over the amount of time Susan was spending with Paul. The Quinns disapproved of all the expensive items Susan had bought for their son and felt she was undermining their authority as parents by showering him with the gifts.
In August 2009, nearly two years after she'd become sexually active with Paul, Susan Brock and Laura Quinn got into an argument after Paul was forbidden from seeing his girlfriend. Brock, also a friend of Paul's girlfriend's mother, told Laura Quinn that she could not be friends with both her and her son — and that her loyalty was to Paul.
By this point, the Quinns' concerns over Brock's fascination with their son had been developing for quite a while. Laura told Brock to stay away from Paul, but Brock refused — she said Laura would have to "put her in jail" before she would stay away from Paul.
The Quinns told Brock to stop giving cell phones to Paul, another request the county supervisor's wife refused. The Quinns would find a cell phone Paul had received from Susan, and they would return it to the Brocks — often only to find it back in Paul's possession soon thereafter.