Porter, who like the other officers has been suspended and working administrative duties with pay since being cleared of criminal charges, can now return to full duty.
The other officers remain suspended with pay and working in administrative roles.
Goodson, the driver of the van transporting Gray, faced the most serious criminal charges of any of the six officers — second-degree depraved-heart murder.
Circuit Judge Barry Williams, in acquitting Goodson of all charges in June 2016, said he was "satisfied" that department rules required Goodson to assess whether or not to seat belt Gray. But he said prosecutors failed to show Goodson "corruptly" failed to follow those rules, the standard needed for a criminal conviction. A different standard will apply to the internal charges.
Rice, the highest-ranking officer of the six charged, was accused in his criminal case of causing Gray's death by failing to secure him in a seat belt in the back of the van. Williams ruled that prosecutors failed to show that Rice had read the new rules on using seat belts or that they negated his ability to use discretion.
"This court's findings and determinations cannot rest upon presumptions or assumptions," Williams ruled.
Prosecutors said that White had received complaints about Gray's arrest, and was responsible for investigating them but only spoke to the back of Gray's head.
"She made no effort to look up or assess or determine his condition," Mosby said in announcing the criminal charges against her.
White, in an interview with The Sun last year after her criminal charges were dropped, maintained that she did nothing wrong. "I did everything that I was trained to do," she said.
Her attorney, Ivan Bates, said last year that her interaction with Gray lasted all of 15 to 20 seconds.
Nero and Miller pursued Gray through the Gilmor Homes after he fled unprovoked, and arrested him for having a knife. Along with Rice, they loaded him into the van shackled and handcuffed, but without a seat belt.
Ray Kelly of the West Baltimore advocacy group No Boundaries Coalition, said the news of internal charges shows the police department is taking the concerns of the community more seriously.
"We can't deny that we now have a visible push for accountability from the police department," Kelly said. "This is definitely change. It's a small step, but it's change."
He said disciplinary actions against the officers would "bring a perception of justice" to people in West Baltimore. He added that changing state law to allow civilians to sit on police trial boards would add more confidence to the system.
"The people aren't able to cast a vote about how they should be disciplined," Kelly said.
