Frank lives in the big city where he has always lived, born and raised. He'll only leave the city when all the corruption and crime has been cleaned up. That, or he leaves in a coffin. On the surface, the city is a bustling metropolis with a high amount of tourism, but the alleys are steeped in crime and poverty. The city government and police force are shown to constantly be working towards the betterment of the city, but the mayor and most of higher-ranking cops are as corrupted as it comes. The outskirts are either slums or rundown factories, both ruled more by gangs and drug-dealing than anything else. The business sectors are home to some of the worst of the worst, "businessmen" that wouldn't hesitate to sell their first child or the country's secrets to continue to stuff their wallets. The construction companies even have their own smuggling operations and generally are left alone by the gangs and law enforcement.
Frank still gets a decent salary from the PD, but he's not above "repurposing" seized funds, but most of it goes to expanding and maintaining an information network of informants and PIs in hopes to one day have enough evidence to bring down all the corruption and crime in the city and surrounding areas. Only a small amount of his income is spent on himself, renting a cheap apartment in a shadier part of town with frozen food and take out for his meals. The only real pleasure he indulges in is occasionally smoking tobacco out of a pipe he inherited from his deceased grandfather.
Frank has forgotten everything he has dreamed of when he was a child, when he was still naive. His only burning desire now is to clean up the city even if it means getting his hands dirty. He's not above using the gangs and mafias against each other, or even stealing resources from the PD; so long as it doesn't hinder the few good people left in the city. He has even gone so far as to have killed a known criminal in cold blood believing the prison system to incompetent enough to release the criminal within the year. Frank holds no delusion that he will ever be revered or remembered as a hero, but he is willing such a fate if it means saving the city he grew up in, even if it costs him his life.
Frank's turning point was in his second year with the PD, just shortly after graduating from the academy. After being the first on scene to a brutal shootout between gangs that took the lives of several bystanders, he put his whole life and career at risk to bring the shooters to justice. But the circumstance of "wrong place, wrong time" revealed that the PD, even with enough evidence to sentence some of the shooters to life, turned an eye because the mayor and Vice captain were using the gang warfare for political fuel. To make matters even worse, both were even providing information and weapons to instigate another shootout. When Frank arrived early to the planned scene, his intention was to prevent the shootout altogether. But instead, his presence instigated the shootout early and with far more casualties then anyone had planned; including a child that died in Frank's arms from a bullet that passed through Frank's side. From that day, Frank lost all sympathy to all that orchestrated or furthered those tragic events, but the deeper he dived the more corruption he uncovered until it seemed the whole city was in on it.
Frank's grandfather was his hero figure: a decorated war veteran that returned home to join the police force and brought great changes to the city. Teddy Knyght was a gentle giant that personified "speak softly and carry a big stick", being like a father-figure to his neighborhood but being one of the toughest police captains on crime and corruption, but age eventually got the better of him.
When going through the police academy, Frank really only had one friend, but they were willing to die for each other. Only a shame though that the corruption of the city where they both grew up in and joined the PD for got to Paul Graham, who took the first chance he had to join law enforcement on a federal level instead of watching his home slowly die from disease.
For most of Frank's early years for the PD he had a girlfriend and eventual fiancé, Lydia Kryzca, who supported him wholeheartedly. But when Frank's single-mindedness started to impact their lives together, she gave him a choice. While they went their separate ways, they both still deeply care for each other and remain in semi-regular contact with her opening her own law firm within the city.
Frank had a reasonably decent childhood, son of an ER nurse and a police captain. His mother always wanted to help people, regardless of who they were or what they did, and she found her way into medicine and the ER. His dad followed in his father's footsteps of fighting for what they thought was right. Frank's father tried to live up to the greatness of his father, and mostly succeeded. While he never went to war like Frank's grandfather, he became the second Captain Knyght, and helped keep the city clean and free of crime. Frank grew up admiring all three, doing what they thought right and not taking nonsense along the way. Frank got into a decent amount of trouble through his school years, but the kind of trouble his family was proud of; even if the school wasn't. By the time he entered the police academy, he had lost his grandfather to natural causes, but it wouldn't be long before he would lose both his parents; his mother to an attack from a in-patient and his father to a retaliation from some criminals he put away. But their deaths only solidified Frank's dedication to following in his parents' footsteps and be a force of good for the city, even if the disease of corruption and crime had returned with a vengeance.
While Frank has had a few flings before, there was only one that he was truly in love with: Lydia Kryzca. They met in a holding room shortly after he joined the force, on opposite ends of the table for a small time dealer. Frank was the arresting officer and Lydia was the junior lawyer appointed to defend him. While they spent the better part of an hour arguing and questioning the dealer, they caught the attention of each other. And with insurmountable evidence against the dealer, it wasn't long until Lydia and Frank were past work and going on a date. They connected over their dedication for justice and cleaning up the city, but both had different methods: Frank doing the grunt work in the streets and Lydia in the courtroom ensuring that everyone had a fair trial. Years of them together had both their offices asking when they would marry when neither Frank nor Lydia had even considered the thought. After being locked in a room by Frank's lieutenant and forcing Frank and Lydia to talk about it, they both quickly and happily agreed, though not as romantically as everyone else had hoped. But the traumatic things that Frank would witness in the following months derailed their relationship; Frank became more and more laser focused on cleaning up the city while Lydia became more interested in being a successful lawyer with her own law firm and they reached a breaking point: both offered an ultimatum that neither would concede on. And while they both are still friends afterwards, they both have been forced to move on, even if neither wanted to.