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On helena s teapot. and they also found serological evidence. we also presented evidence that the semen on the pillowcase in helena greenwood s bedroom, first, that it was semen and, second, it was from a type o, individual, who was a secreter, and a pgm type, a mutase of one-plus all matched frediani s abo type. dna testing was still in its infancy. at the last minute when faced with the fingerprint and serological evidence, he pled no contest to the assault and was sentenced to five years in prison. but frediani said he was innocent of her murder. they knew who killed helena ....