Prosecutors in Ohio have released a frame-by-frame analysis of surveillance camera footage that shows a white Cleveland police officer fatally shooting a black 12-year-old boy who had a pellet gun last year.

The enhancement by a video expert will be presented to a grand jury that's been meeting to decide if patrolman Timothy Loehmann should be charged criminally for killing Tamir Rice outside a Cleveland recreation center on November 22, 2014.

Cuyahoga County Prosecutor Tim McGinty said in a statement that the new footage was released in the "spirit of openness."

The video was taken by a security camera at Cudell Recreation Center, where Tamir was shot, and shows more angles.

The enhancement doesn't appear to provide any new information. McGinty called the additional images "pieces of a complex puzzle."