The sex offender registry in WA only shows level 2 and 3 sex (which eliminates your 18 year olds and their 16 year old girlfriend situations) offenders and gives very vague descriptions of their locations. Florida gives you a Google map to their home, license plate number and their picture.
From what it sounds like, this guy may have known these guys. He had more rapeos on this hit list. They were both Level 2 sex offenders. One was convicted of Rape 3 and the other was convicted of Child Rape 1.
It's my understanding that one of the victims was a high school senior and had consensual sex with his girlfriend that was a freshman. That's where his 'sex offender' status was derived.
I'm not sure you'd get Rape 3rd Degree for that. I also don't think that 10 years later you'd still be a level 2 sex offender. Here is the description of his crime:
RCW 9A.44.060
Rape in the third degree.
(1) A person is guilty of rape in the third degree when, under circumstances not constituting rape in the first or second degrees, such person engages in sexual intercourse with another person, not married to the perpetrator:
(a) Where the victim did not consent as defined in RCW 9A.44.010(7), to sexual intercourse with the perpetrator and such lack of consent was clearly expressed by the victim's words or conduct, or
(b) Where there is threat of substantial unlawful harm to property rights of the victim.
(2) Rape in the third degree is a class C felony.