Prosecutors have dropped charges against a black Yale University dining services worker who used a broomstick to smash a stained-glass window depicting slaves.

The end of the criminal case Tuesday comes a day after Corey Menafee returned to work at Yale.

Menafee says he destroyed the window inside Calhoun College in June because he found it offensive. The name of the residential college has sparked protests because it honors former Vice President John C. Calhoun, an 1804 Yale graduate and an ardent defender of slavery.

Menafee, who resigned after the incident, was rehired last week. The school said he would be working in a different setting.

Menafee thanked his supporters outside the courthouse before being escorted away by his attorney, who said Menafee needed to get to work.