The dismissal was announced by Dallas Police Chief Reneé Hall on Twitter.
Two men were attacked in a possible hate crime on Sunday outside of Metropolitan, a popular gay bar in Williamsburg, Brooklyn.
William Winters Leverett is charged with stabbing insurance executive Melissa Millan to death in November, 2014, while she was jogging in Simsbury, Connecticut.
Before Constand took the stand, a psychologist testified that Cosby is a "sexually violent predator."
Drejka appeared "more angry" than remorseful during the shooting, according to a bystander.