My wife in the USA had semi-anonymous texts send to her personal over a course of 2 years. They included her home address, her mother's home address with a picture of the home, and they stated that they would kill her and anyone she loved.

She never saw justice for it. The police said there was nothing they could do, despite having the phone number it came from, because it was across state lines.

The texts stop, and we suspect that it coincided with a specific person who went to jail for a year or so for unrelated offences around the time that the texts stopped.

That person is still out there.