The wrongful conviction of Sean Ellis, who spent 22 years behind bars for a murder he did not commit thanks to corrupt Boston police, is shining a light on the need for a broader investigation into dirty cops involved in false conviction cases, Ellis' attorney, Rosemary Scapicchio told Jim Braude on Greater Boston.

"Why aren't we looking to maintain the integrity of the criminal justice system?" Scapicchio said. "Why aren't we looking at the Boston police and saying, 'there was a problem here, and it's repeating itself over and over and over again.'"

Now, an ongoing investigation launched by former Suffolk County District Attorney Rachael Rollins seeks charges against former detective John Brazil in the false conviction of Ellis and another man, James Lucien, who was released from prison after 26 years.

"We should not leave it up to these defense attorneys and these defendants to pick these cases off one at a time." Scapicchio said. "We should, as an institution, be investigating any cases that these cops were involved in to determine whether or not their lies contributed to other wrongful convictions."

WATCH: Criminal Defense Attorney Rosemary Scapicchio on Boston cops involved in false-conviction cases