From the article.
"The gunshot entered in this thigh and came out on his lower leg near his ankle. It appears to be a through and through wound. we’re very happy and relieved to say he is alert, conscious and he is doing well,” Acevedo said.
He blamed the holster, saying it has a design flaw that he believes contributed to the accidental shooting.
“The holster he was using is a holster that has a release right here on the side of the holster and as he came up his finger inadvertently ended up engaging at the trigger into the trigger guard and he shot himself in the thigh,” Acevedo said.
Acevedo said the department is conducting an investigation into the incident. He said he expects the department to prohibit the use of that particular holster by other officers because it’s not safe.
Focus on this part of the quote.
as he came up his finger inadvertently ended up engaging at the trigger
So Acevedo said the officer engaged the trigger, but the holster is to blame. IMHO that is a political statement. Blame everyone who isn't on our team. Hmmmm... how long before the lawsuit?