Jeg har brug for beskyttelse. Desværre kunne politiet ikke hjælpe ham, så efter 3 måneder var han desperat. Til slut hyrede han en ung privat detetiv
I februar tilbragte detektiven en hel ugen sammen med ....
Engang fangede nogle af ... gangstere ... og tævede ham. han vidste at næste gang ville du slå ham ihjel.
I checked the pronouns and they are correct. I wasn't really sure in the last sentence whether the original text was correct or whether there was a spelling mistake. If the last sentence really is "han vidste at næste gang ville du slå ham ihjel." then my translation is correct, but if the last sentence actually is "han vidste at næste gang ville de slå ham ihjel." then the translation must be "he knew that the next time they would kill him".
If police is regarded as a plural object one just has to change "the police wasn't able..." into "the police weren't able...".
Thanks for your commentary!