Philadelphia’s Police Advisory Commission has been examining cases of 19 police officers who were dismissed from the department and then welcomed back, like Lt. Jonathan Josey who was fired after a video revealed him punching Aida Guzmán at the 2012 Puerto Rican Day Parade. Now, the commission wants to know more about the city’s arbitration process and how dismissed officers end up back on the force.

“What we've tried to find out is why that occurs and what remedies there would be to that process," the commission’s director, Kelvyn Anderson, told press on Monday, Nov. 17.

The commission examined 26 cases from 2008 to 2013, according to a recently released report. In just seven of those cases, arbitrators agreed that the City had cause to dismiss the officer accused of misconduct. Josey, one of the fully reinstated officers, was originally discharged for excessive force. The arbitrator watched the video of Josey striking Aida Guzmán, and said that the punch was, “by no means a knock down blow,” arguing that Guzmán slipped into Josey’s hand as he was trying to take her drink away.

Anderson said that the arbitrator may have reinstate Josey because the police department failed to produce a full investigation before dismissal. The commission said that it hopes to get some answers, and ultimately improve the arbitration process.