Authorities in Maine are still on the hunt for Robert Card, the suspected shooter responsible for the deaths of at least 18 people at a bowling alley and a restaurant in Lewiston. As investigators delve into Card's background, questions arise about what characterizes mass shooters and if there are any patterns or warning signs to help prevent such tragedies.

One theory is that military service may play a role, citing previous high-profile cases involving shooters with military backgrounds. However, this connection is not universal, as many mass killers have no military background. Another common assumption is that mental illness is a driving factor, which has been used as an argument against gun control. However, the majority of mass killers have not been diagnosed with psychiatric disorders.

Studies on mass shooting incidents have found that about 30% of perpetrators experienced psychotic symptoms and showed signs of crisis prior to the incidents. This has led to the introduction of "red flag" laws in many states, allowing law enforcement or family members to petition for extreme risk protection orders and the temporary removal of firearms from individuals deemed dangerous.

The manhunt for Card continues, with law enforcement conducting searches and urging residents to stay indoors. As the investigation progresses, the focus remains on identifying patterns, warning signs, and policies that can help prevent such tragedies in the future.