This time, the coffee giant apologizes to officers with the Tempe Police Department in Arizona.
"Barista asked the officers to move out of the customer's field of vision or to leave," the association said. The officers eventually left the shop "disappointed".
"This treatment of public security workers could not be more disappointing. While the barista was polite, there was such a request that it was offensive," the reading said. "Sorry, such treatment has become too common in 201[ads1]9."
Hours before the release of this statement, the association released a modified Starbucks graphic with a hand that extracts coffee reading "Dump Starbucks." The graphics also led to hashtag #DumpStarbucks on social media.
"Several of the officers asked to leave are veterans who fought for this country. Zero respect …" mail read.
"When the officers entered the store and one customer raised concerns about their presence, they should have been welcomed and treated with dignity and the utmost respect from our partners (employees). Instead, they were made to feel unwelcome and disrespected, which is completely unacceptable, says Williams statement.
Williams said the company has a "deep appreciation" for the Tempe department and the officers who serve it community.
"Our partners trust your service and welcome you, which keeps our shops and the community a safe and welcoming place, says the statement. "What happened in our store on July 4th is never the experience your officers or anyone should have, and in Starbucks we already take the necessary steps to ensure that this doesn't happen again in the future."
 CNN's Kevin Bohn contributed to this report.