Why was one NY prison guard guilty of murdering Robert Brooks, but two others were cleared of all charges?

Utica, N.Y. — Why did an Oneida County jury convict a former state corrections officer Monday of murder, but acquitted two other guards in the brutal beating death of an inmate last winter?

One juror put it bluntly outside the courthouse: Because the convicted guard, David Kingsley, “strangled the dude to death.”