A verdict is expected in the case of a former nurse charged with 100 counts of murder on allegations he killed patients by putting them into cardiac arrest because he liked the feeling of being to resuscitate them.

The 42-year-old Niels Hoegel faces possible life in prison if convicted on Thursday of the killings at two hospitals in northwestern Germany from 1999 to 2005.

Prosecutors are asking the court in Oldenburg to recognise the “particular seriousness of the crimes” to ensure he serves beyond the standard 15-year term.

During the seven-month trial, Hoegel admitted to 43 of the killings, disputed five, and said he couldn’t remember the other 52.

Hoegel expressed regret in a closing statement Wednesday, saying he realised how much pain and suffering he’d caused with his “terrible deeds.”