"If they hadn't been caught, they were planning to go to New York and probably do the same thing there," Ryan said of the alleged bombers, adding that members of his extended family where very close to where one of two bombs exploded near the marathon's finish line on April 15.
In the past, not everyone has supported expanding the use of the surveillance cameras. While many people see them as a valuable public safety tool, others consider them an invasion of privacy or don't trust how the government will use them.
In Haverhill, police said the cameras have captured images of drug deals, people vandalizing buildings and instances of illegal dumping. But some residents have also raised concerns, suggesting some cameras might be able to see inside homes or used to spy on law-abiding citizens.
"The cameras can also be a deterrent because people might be less likely to commit a crime if they know they are being taped or photographed," Ryan said.
Councilor Thomas Sullivan said he wants to make sure some of the cameras are deployed at city schools, playgrounds and large parks.