I'm not sure specifically about his role in 'Police Story' without more research. But generally, he might have played a police officer or a character related to the police operations in the story.
Since Erik Estrada starred in 'Police Story', his performance was likely a significant part of what made the movie appealing. He may have used his physicality to great effect, perhaps in chase scenes or in confrontations. His facial expressions and line delivery would have helped to convey the character's thoughts and feelings. Moreover, his interaction with other actors in the movie would have created the relationships and tensions necessary for a good police - themed story. If he played a police officer, he might have shown the different aspects of the job, like the stress, the loyalty to the badge, and the relationships with the community.
In the 'the lyle and erik menendez story', Lyle and Erik Menendez are brothers. They are known for their heinous act of killing their parents. Their case got a lot of media attention and raised many questions about family and crime.
Since it's a fanfiction, Erik Lehsner could be an original character created by the author. He might be a fictional being with certain special traits or powers that are important to the story. Maybe he's a supernatural entity, like a vampire or a wizard, which would add an interesting dynamic to his relationship with a human.
Erik is likely not based on a true story. Many such characters are invented to entertain or convey certain themes and messages, rather than being rooted in actual happenings.
Well, Fallout 3's story is great for those who like a more personal and somewhat linear adventure. The main character has a clear goal from the start - find dad. The worldbuilding in Fallout 3 is also quite good, but it mainly serves to support this central story. In Fallout New Vegas, the story is a complex web. You start as a Courier who gets caught in the middle of a huge power struggle. There are so many different paths you can take depending on which faction you side with. Each faction has its own ideology and goals, and your choices really shape the outcome of the story. It offers a much more immersive and replayable story experience than Fallout 3.