A special sitting of the Royal Court was held this afternoon to charge the 30-year-old with his wife Izabela's murder, as well as their children Kinga, 5, and Kacper, 2.
Izabela’s father Marek Garstka (56) was also killed, as well as Izabela's friend Marta Dominika De La Haye, (nee Klonowska), aged 34, and her five-year-old daughter Julia Frances De La Haye.
He reserved his plea on all six counts.
The murders happened almost two weeks ago at the family's home in Victoria Crescent, St Helier.
Damian Rzeszowski had been under police guard in hospital since the killing. He had needed emergency surgery following the incident on Sunday 14 August.
On Wednesday he was declared well enough for discharge from hospital and, consequently, transferred to police detention.
The case has now been adjourned until October 28th to gather further evidence.
The accused has been remanded in custody.