based on experience, actually.
there this guy who bang a girl, bu refused to marry her. after a year, the girl make a reported to the police station. the police said "when the last time you got "creampied", the girl said it was last year and so the police offered the girl to force the guy confessed or its futile. man sperm stay inside your womb at least 5-6 months so we can use that to sue the guy.
welp, maybe i am ¯\(ツ)/¯
You're either lying, or were fed bullshit by that guy who was a rapist (or maybe you live in a corrupt trashland where someone bribed the cops).
Regardless, sperm isn't viable beyond a few days
at most. It also doesn't hang out in the womb... fertilization occurs in the fallopian tubes...
And sperm is only viable for a few days at most.
Like, whether you made that up or someone lied to you, someone needs to do their homework a bit better before coming up with this stuff.
Also, why would the cops be involved with suing someone? Lawsuits are civil, cops are criminal, and that's true for most countries regardless of legal system...