(Cleveland) - The multiple stabbings a high school in Murrysville near Pittsburgh has education administrators and parents nationwide rethinking school security.

But a school security expert in Cleveland doesn't feel increased technology is the answer.

Kenneth Trump, president of National School Safety and Security Services says it's often easy for the teachers to identify which students may be potentially dangerous.

However, he maintains there frequently is little follow up because of a lack of school psychologists and mental health professionals, who usually have to cover students spanning several buildings.

While, metal detectors and security cameras make parents feel good about security, Trump tells Newsradio WTAM 1100 the best defense are students who report their observations beforehand to an adult they trust.

Trump says high-profile violent incidents at schools tend to occur in the early morning, when teachers are not there, and only lax security is in place, usually just a custodian.

In the Murrysville incident, Trump says the first response was to activate the fire alarm to get all the students out of the building.

He contends that was the wrong response, because it put students at risk of being stabbed as they scrambled out of the building.

Trump says school leaders should have locked down the building, keeping most students safe in their classrooms until help arrived.

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