Thomas Anthony Eisan

Thomas Anthony Eisan pleaded not guilty to a weapons offence Thursday. (CBC)

A Dartmouth man who worked as a nanny and at daycares in Halifax collected "sadistic and horrific" images of children being sexually abused, a Crown attorney said Thursday.

Thomas Anthony Eisan, 26, is in jail awaiting sentencing. He admitted in November to possessing hundreds of explicit photos and videos of children being attacked.

Peter Dostal is prosecuting the case.

"Some of the materials found on the machine were quite disturbing. I wouldn't downplay what they depict. There's certainly some sadistic material," he said.

They include young girls being abused by adults.

"I believe the materials did include some in which you would see children in pain, crying. Truly some of the most horrific stuff that can be found in these types of materials," he said.

Eisan was caught in Operation Snapshot Two last summer — a child pornography probe that resulted in the arrests of 22 people in Atlantic Canada. The investigation was led by Toronto RCMP.

Eisan pleaded guilty to possessing child pornography, but pleaded not guilty to a weapons charge on Thursday.

The Crown dropped a charge of making child pornography available, due to insufficient evidence. 

Eisan was a live-in nanny watching eight children in north-end Halifax. None of those children were in the images.

Dostal said that added to the crime. "Individuals committing these offences, when they are around children, it is highly concerning," he said.

Eisan is due back in court in two weeks for sentencing.