The Colorado Springs Police Department released their report to the city manager on Friday regarding the improper disposal of evidence.
Police Chief Luis Velez and City Manager Lorne Kramer held a press conference to announce the findings of the investigation.
Police originally thought that 4,117 cases could be affected by the more than 11,000 pieces of evidence that were destroyed.
In the report, they have narrowed that number down to 553 cases that have lost significant evidence, but said that only 75 cases were in danger of losing a prosecution.
The evidence supervisor has been put on administrative leave with pay until the end of the current investigation.
An independent report by the city auditor will be presented to the City Council next week.