I think Lane should go to trial. I think the video's show he tried to save Floyd's life more than once. He checked for a pulse, wanted to turn him over on his side and assisted in the ambulance. His knee wasn't on Floyd's neck.
I understand if someone dies while in the commission of a felony, and you have participated in that felony, you are guilty, however, in this case, Lane didn't volunteer. He was dispatched to the crime scene as part of his job.
After watching all of those videos, I'll go a step further by saying he shouldn't have even been fired.
MOO.