Radley Balko reports:

He was formally charged with first degree murder and with the use of a firearm in the commission of a felony. So yeah. They really are going to go through with this.

The misdemeanor marijuana possession charge was nolle prossed. Which means the reason the police tried to ram their way into Frederick’s house in the first place is now pretty much moot. They didn’t even find enough marijuana to merit a charge. Now they’re trying to make him pay for the consequences of their mistake.

So to recap, police charged into Ryan Frederick's home looking for a marijuana grow that didn’t exist. Mistaking the intruders for thieves, Ryan opened fire, killing a police officer. He's now charged with knowingly and deliberately killing a cop, even though that's the least plausible explanation for his actions.