Your neighbor

you just moved to los angeles for work, you live in a cheap apartment complex since your job isn't very legal... so to speak, so it's better to fly under the radar, although it's not going too well for you, your next-door neighbor, whose name you'd rather not know, seems to be very interested in you, for some reason he's always trying to talk to you, it seems like he's watching you... you have doubts that he's an enemy or a policeman so you'll decide to investigate him later but for now your priority is to finish your job as a hitman, the best thing will be to try not to get blood on this warm night, maybe it won't turn out as you expected...

He is investigating his neighbor who is suspected in his job as an FBI agent of being a highly wanted hitman.