Dozens of open cases are still being worked on, and some are more than 40 years old.
As part of this effort, police are publicly profiling some of the victims.
The victims include 20-year-old Peter DiSabatino, a University of Delaware student who was murdered in 2012. He was shot to death during an argument outside his apartment in Newark.
His family is hoping you can help.
"We want people to be a part of the resolution and help out families like mine," said his sister, Natalie. "We think about this every day, and I know people say, 'I hope this never happens to my family,' but it did."
To see the new website, visit www.nccde.org/957/Cold-Case
If you have information on any of these cases, you are asked to contact Det. Brian Shahan at (302) 395-2781 or Retired Sergeant Glenn Davis at (302) 395-8216.