Another theme is the idea of sacrifice. The lovers may sacrifice their own safety, freedom or even their sense of right and wrong for the sake of their relationship. For example, one might take the blame for a crime the other committed to protect them. Also, there is often the theme of danger. The criminal element brings a constant sense of danger into their relationship, which can either strengthen or destroy their love. They live on the edge, and this precarious existence affects how they interact with each other.
Betrayal is a common theme. In many crime love stories, one partner may betray the other, which often leads to the crime. For example, in 'Gone Girl', the wife fakes her own disappearance as a form of revenge against her husband's infidelity. Another theme is obsession. One character may be overly obsessed with the other, which can turn into a dangerous and criminal situation.
One common theme is the idea of forbidden love. In many crime love stories, the characters are involved in illegal or unethical activities, and their love is something that society would not approve of. For example, in a story where a criminal falls in love with a police officer, or two members of rival gangs fall in love. Another theme is redemption through love. Sometimes, the love between the characters can lead to one or both of them trying to break free from their criminal ways.
One common theme could be the conflict between love and duty in the context of crime and patrol. The characters might have to choose between their love for someone and their responsibility to uphold the law or solve crimes.
One common theme is power. Criminals are often after power, whether it's power over other people, in a criminal organization, or in the underworld in general. Another theme is revenge. Many crime stories involve characters seeking revenge for some wrong done to them.
One common theme is the pursuit of justice. The detective or protagonist is often on a quest to solve a crime and make sure the guilty are punished. Another theme is mystery itself, with lots of twists and turns to keep readers guessing. Also, the exploration of human nature in the face of crime, like how people can be driven to evil deeds or how they react when faced with danger.
Common themes in crime fiction include the exploration of society's underbelly. This shows the seedy parts of a community, like gangs, drug dealing, and prostitution. The theme of the outsider is also there. The detective is often an outsider, either new to the area or an outcast in some way, which gives them a unique perspective. And, of course, there's the theme of death. Crimes usually involve death or the threat of it, and the story revolves around understanding how and why that death occurred.
Themes in crime fiction are diverse. For instance, there's the theme of society and class. Crimes may be related to the social and economic disparities in society. The upper class might use their status to cover up crimes, while the lower class might be more likely to be the victims. Another theme is the human psyche. Understanding the motives of criminals, which could be rooted in psychological issues like envy, greed, or a desire for revenge, is a major aspect. And then there's the theme of survival. In some crime stories, characters are simply trying to survive in a dangerous world full of criminals.
Temptation is another theme. For example, the young man who saw the old lady's loose purse and couldn't resist the urge to steal it. It shows how people can give in to sudden temptations and commit a crime.
One common theme is deception. The criminal has to deceive everyone around them to pull off the perfect crime.
I don't think it's a common genre. Crime - related stories often focus on the investigation, the criminals, and the justice system. Love stories are mainly about relationships. So, 'crime patrol love story' which mixes these two different aspects is not that common. It might be a new or niche concept.