The District of Columbia inspector general found that the police department closes murders at the same rate as the national average but concluded that its homicide department needed more training, basic supplies and a computer system connected to evidence and witnesses records.

In a review of the way the Metropolitan Police Department solves the city’s murders, the 77-page report by Inspector General Charles Willoughby also found that the cold-case room was left unsecured, reducing the likelihood of solving the District’s 3,800 homicide cases that have gone unsolved for more than three years.