Dugan Arnett

And even when police rely on a single, unnamed CI, a few questions are asked. Andrew found that almost every search warrant submitted in Massachusetts is approved.

And even when police rely on a single, unnamed CI, a few questions are asked. Andrew found that almost every search warrant submitted in Massachusetts is approved.

Prosecutors do have the power to push back on officers with problematic histories around search warrants or informants, but they almost never do.

Prosecutors do have the power to push back on officers with problematic histories around search warrants or informants, but they almost never do.

What we found was that when suspicions about the credibility of a cop or their informant arise, prosecutors circle the wagons. They fight inquiries from defense attorneys who say their clients' cases are tainted. They'll sooner drop charges or offer generous plea deals than dole out any information that could reveal misconduct.

What we found was that when suspicions about the credibility of a cop or their informant arise, prosecutors circle the wagons. They fight inquiries from defense attorneys who say their clients' cases are tainted. They'll sooner drop charges or offer generous plea deals than dole out any information that could reveal misconduct.

We've uncovered more than a dozen cops that records show have lied, broken rules, and even the law. But district attorneys continue to put faith in their work. All this secrecy and lack of accountability can have serious consequences.

We've uncovered more than a dozen cops that records show have lied, broken rules, and even the law. But district attorneys continue to put faith in their work. All this secrecy and lack of accountability can have serious consequences.

Just think about the 20 people, at least, that Russ says he helped the police set up. And Natapoff adds that police policies around the use of informants are flimsy.

Just think about the 20 people, at least, that Russ says he helped the police set up. And Natapoff adds that police policies around the use of informants are flimsy.

And then there are people like Carly Medeiros who don't even realize they've been pulled into this world.

And then there are people like Carly Medeiros who don't even realize they've been pulled into this world.

Cancer is sadly very common in America. It's rare that someone has not been impacted by the disease, whether they endured it themselves or witnessed a loved one. Which is why I want to tell you about my Boston Globe colleagues' brand new five-part series, The C-Word, Stories of Cancer, on the Say More podcast.

Cancer is sadly very common in America. It's rare that someone has not been impacted by the disease, whether they endured it themselves or witnessed a loved one. Which is why I want to tell you about my Boston Globe colleagues' brand new five-part series, The C-Word, Stories of Cancer, on the Say More podcast.

In the series, award-winning columnist and host Shirley Leung shares her own journey with breast cancer for the first time. While telling her story, Shirley explores the science, history, and real-life impact of the disease, bringing together experts, survivors, and groundbreaking research. Follow Say More from the Boston Globe wherever you get your podcasts.

In the series, award-winning columnist and host Shirley Leung shares her own journey with breast cancer for the first time. While telling her story, Shirley explores the science, history, and real-life impact of the disease, bringing together experts, survivors, and groundbreaking research. Follow Say More from the Boston Globe wherever you get your podcasts.

Let's get back to that night in the summer of 2017, when Carly Medeiros was expecting a night out for her fiancé's birthday, but instead wound up surrounded by police in an apartment building parking lot.

Let's get back to that night in the summer of 2017, when Carly Medeiros was expecting a night out for her fiancé's birthday, but instead wound up surrounded by police in an apartment building parking lot.

And there's a lot of cops.

And there's a lot of cops.