The MBTA's security program is being scrutinized, including random checks of T passengers. Over the four years since the checks began, no arrests have been made.
MBTA Police Chief Paul MacMillan says the random checks are designed to prevent terrorist attacks.
"These are designed for terror attacks. The reason we wouldn't have arrests for drugs or weapons is because we're not looking for that," MacMillan says.
But Chris Ott of the American Civil Liberties Union-Massachusetts, which opposes the checks, says police should review the effectiveness.
"A determined attacker could very easily avoid these searches. And, you know, just because they haven't found anything doesn't mean that they're effective," Ott says.
MacMillan says the checks are just one of several measures aimed at preventing terrorist attacks.
This program aired on October 18, 2010. The audio for this program is not available.