Several Danbury schools were briefly placed in lockdown yesterday as police searched for a despondent person believed to be armed with a handgun.  Danbury Police received a call from a resident yesterday morning asking for help in locating a relative who may have been suicidal.  Officers searched the area and located the man at a residence on Moran Avenue.  The area was closed off and businesses and schools were notified and secured until the person was contacted and provided with services. The incident ended peacefully around 12:30pm.  Superintendent Kevin Walston says the lockdown and then shelter in place lasted about 40 minutes before normal operations resumed at Broadview Middle School, Ellsworth Elementary School, Hayestown Avenue Elementary School, the Alternative Center for Excellence, and the Danbury Early Childhood Center on Granville Avenue.  A private Catholic school and Henry Abbott Technical High School were also placed on lockdown.