No there must be checks out there. From the top of my head and stuff I've noticed I would do the following;
Ask the victim to describe the assailants crotch area etc. and cross check.
DNA tests if the guy was stupid enough not to wear a condom (but this was Assagne).
Corresponding physical injuries or bruises as described by the victim on the assailants body (there's almost always a struggle in a rape).
Clothing with traces of the victim for example hair samples from a jacket, shoe or clothing unlikely to be rinsed(in case he claims that they have never met).
Trace biological evidence on the scene (can be faked though).
Interrogation. (even very smart people tend to slip up)
Standard investigations (alibis blah blah the entire detective book routine)
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I think that the real problem is that it takes too long to verify for the 24 hour news cycle unlike a murder.
I sat on a jury in a case that involved allegations of rape. One constant refrain from the nurses who examine rape victims is that there is often little to no physical trauma even when there has been a struggle. Furthermore, except in cases where it's a totally random event, the victim ofte may know the person. Even in the case where someone meets a person in a club and goes home with them, there are still legitimate explanations for lots of the physical evidence. So then it all comes down to whether or not you believe the plantiff or not. Shows like CSI and NCIS make people think that all kinds of science can prove this stuff, but in reality, the evidence is never as clear cut as you would like to think.
In all of these instances, you're assuming that this was some sort of back-alley rape that they're alleging... at best, you'd prove that some sort of sexual contact had taken place. It doesn't go to prove thought or intent, which is the whole point the parent was trying to make.
Ask the victim to describe the assailants crotch area etc. and cross check.
DNA tests if the guy was stupid enough not to wear a condom (but this was Assagne).
Corresponding physical injuries or bruises as described by the victim on the assailants body (there's almost always a struggle in a rape).
Clothing with traces of the victim for example hair samples from a jacket, shoe or clothing unlikely to be rinsed(in case he claims that they have never met).
Trace biological evidence on the scene (can be faked though).
Interrogation. (even very smart people tend to slip up)
Standard investigations (alibis blah blah the entire detective book routine)
----
I think that the real problem is that it takes too long to verify for the 24 hour news cycle unlike a murder.