UTICA, N.Y. -- It was a long Thursday for jurors in the Oneida County Courthouse.

In the morning, one of the investigators who interviewed Fahrudin Omerovic finished his testimony. The investigator knew Omerovic and his family prior to the phone calls.

Back in March, the investigator had taken the former student out of the interview room, per Omerovic's request, and recorded audio of him admitting to making the calls.

Omerovic has repeatedly asked if the investigator's body camera was on, and the investigator told him it was off. However, the investigator testified it was a different audio device that recorded their conversation.

The calls prompted a campus lockdown that lasted several hours on March 5.

Omerovic did not say why the calls were made.

The defense claims police suggested the details to the Omerovic during the interview and that Omerovic didn't give any details on the calls.

The Utica College President also took the stand, and said the calls have led to security changes on campus.

"We have installed security cameras, much more of a security camera presence. We are in the process of making sure that putting in swipe card access into academic buildings that work is underway," said Utica College President Laura Casamento.

Several students also testified and cried on the stand. They described how they barricaded the rooms, contacted their families, and went to the bathroom -- often in waste baskets or water bottles -- during the lockdown.

A few said they spoke with Omerovic during the lockdown and claimed he tried to comfort them.

The trial resumes Friday.