A Stamford man appeared in court Friday for walking onto a field at Springdale School with a samurai sword and allegedly threatening President Barack Obama.

Witnesses told police that William Kemsley was talking on his phone about ISIS and the president with a crazed look on his face Thursday morning. They say Kemsley, 44, had the sword in a holster around his waist.

Police say the school was put into lockdown mode while the suspect was arrested.

Officers say he is a convicted felon with a history of mental health incidents. They say he also has a protective order forbidding him from possessing any types of dangerous weapons.

Kemsley is being held on $50,000 bond. He is set to appear in court again next month.