Mental status of man who threatened Peninsula politicians to be revealed 

The  mental evaluation of a San Bruno man who allegedly threatened to kill public officials and attorneys on the Peninsula is complete, with the results set to be revealed Monday.

John Costa’s attorney postponed criminal proceedings against the “paranoid” 64-year-old after questioning his competency to stand trial, according to San Mateo County District Attorney Steve Wagstaffe.

The competency report has been filed and was set to be heard in South San Francisco misdemeanor court Monday around 9 a.m., Wagstaffe said.

Costa allegedly made the alarming threats last fall.

In one of a series of alarming incidents between September and December, Costa phoned threats in to the San Bruno City Clerk’s Office warning that he would kill city council members and police who tried to enter his home, authorities said.

Costa had “manufactured in his mind” that the San Bruno officials were trying to cause him harm, Wagstaffe said.

Costa also left several messages at St. Dunstan Church in Millbrae claiming a priest there had killed his mother and another parishioner, authorities said.

Costa allegedly threatened attorneys as well. He left up to 60 phone messages in one weekend to Millbrae Attorney George Corey. He stated Corey was in cahoots with President Barack Obama and the Secret Service and that the attorney “needed to be executed,” Wagstaffe said.

When Corey wouldn’t represent him, Costa then turned to attorneys Al and Ann Martin. He repeatedly called them, telling them they’d better take him on as a client or else, Wagstaffe said.

A search of Costa’s home showed no credible evidence that Costa had planned to carry out his threats, authorities said.

“Mental illness is what’s driving this,” Wagstaffe said.

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