Kenneth Douglas, 55, took advantage of 16 years of night shifts to abuse the women’s bodies.
He was frequently high on drink or drugs during his macabre activities, which were only discovered after police carried out DNA tests.
Douglas is already serving a prison sentence after admitting having sex with the nearly beheaded corpse of Karen Range, who was 19 when she was murdered in 1982.
But he now faces two identical charges after forensic experts inHamilton County, Indianaanalysed evidence from twowomen who were murdered in 1991.
Police believe the number of bodies he abused could be more than a hundred, though he claims to not remember any identities.
‘I am sure there are more [victims]. I’m certain of it,’Hamilton County Prosecutor Joe Deters said.
‘This guy’s just a pig. I can’t explain why someone would do something like this. This is off-the-charts weird.
‘We’ll never know how many victims there are because he doesn’t know. We probably won’t ever know the scope of his abuse.
‘Frankly, it’s frightening. [When he talks to the authorities about the abuse] his numbers go from one to three or four to “a lot” to maybe over a hundred.
‘I think it’s fair to speculate that he’s been doing this all the time, when he’s able and had the opportunity.’
Police examined Douglas’ activities after he was convicted of abusing Range’s corpse last year.
They identified 15 bodies which they believe could have been violated by the night attendant, recovering DNA evidence from two.
These were the six-months-pregnant corpse of Charlene Edwards, who was strangled on October 1, 1991.
The second was Angel Hicks, 24.
Crucial swabs were taken during post-mortems of both women. But only advances in DNA over the last 18 years linked Douglas to the crimes.
The families of the women were contacted when he was charged.
‘It’s fair to say they were devastated by this news,’ Mr Deters said. ‘I feel badly for the families who are never going to know.
He added: ‘I hope I never see anybody like Kenneth Douglas again.’
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