Dietmann said he had met Rica in 2004 as just friends but that their relationship had become sexual in 2009. According to Daily Mail, Dietmann said during their sexual relationship, they had always used vegetables in place of sex toys, vegetables like cucumbers, carrots etc for sexual pleasures.
He added that he had invited Rica to his house on July 19th 2014 and admitted that they had drunk four bottles of wine between them and several glasses of schnapps.
The court in Mannheim where Dietmann is on trial had Rica's family, her Dad and sister, in court, listening to the explicit details of the day their sister/daughter died.
He said on that day, after he had pleasured Rica with a cucumber, he put it it in her mouth. But then he saw smoke coming from his kitchen and ran to the kitchen, forgetting the cucumber in Rica's mouth.
"I forgot that I had put a piece of meat on the stove for my dog. 'I ran to the kitchen, fed my dog and then went on to the balcony to smoke a cigarette.'He said by the time he returned to the bedroom, Rica was unconscious.
'I tried to get the cucumber pieces out of her mouth,' he said, 'but they were so mushy I couldn't get any purchase at all.'
Medical experts during the trial said that the cucumber had gotten wedged in her throat, when he had left her unattended and that had cut off her air supply and plunged her into a coma.
A verdict in the case is due on Friday.