A jilted teen who planned to kidnap his crush, kill her and then kill himself has gone on trial for attempted murder after her mum opened the door and he allegedly stabbed her 26 times.

Jonathan R., 19, of the city of Leverkusen went on trial at the district court in the city of Cologne in the German state of North Rhine-Westphalia on Monday, 11th October.

According to the indictment, the defendant had planned to kidnap his classmate, who did not share the same feelings he had for her, at knifepoint and then kill her before taking his own life.

However, when her mother opened the door, the balaclava-wearing teen lashed out in a fit of pique and stabbed her 26 times, critically injuring her.

The defendant, who was classified as sane, said in court: “I wanted to emigrate with her, far away from the EU, and I was already making family plans. But she didn’t respond to my messages.

“I decided to die and take her with me.”

He added: “I also wanted to eliminate anyone who got in my way. I didn’t even realise the person who opened the door was her mother.”

He expressed apparent remorse for his act, stating: “I am deeply ashamed. I regret it today.”

The 58-year-old victim, whose name was not reported, testified on the first day of the trial, stating: “I had never heard of him from my daughter. When the doorbell rang in the evening, I thought it was my cousin and therefore opened the door slightly.

“But in front of me was a masked man who held up his right arm and began to stab me.”

She told the court how she still suffered from pain and sleepless nights following the incident that took place in April, shortly after which the suspect was arrested and she had to undergo emergency surgery to save her life.

The court proceedings are expected to last until 17th November.