He had a working key for the room, and also a note purporting to be from the supposed victim giving him permission to enter the room.
Loughrin said the man was arrested at home today.
"A search was conducted at the man's home, and a significant number of items belonging to the victims have been recovered.
"This included two journals documenting the lives of the victims' daughters, electronic items, and other luggage.
"It was great to see the local community working together to help victims and the police, for what was fortunately a successful outcome," Loughrin said.
Police were also working with the motel to help enhance their security measures, he said.