Diesel was one of four K-9s in the department and had been with the department for about one year.
The state attorney's office will determine if charges will be filed.
The Sebastian Police Department released the following statement on Diesel's death:
"As many of you have heard we suffered a tragic loss of one of our beloved K-9's on Friday April 28, 2017. The incident occurred in Melbourne Florida. The situation is being investigated by the Melbourne Police Department and when their investigation is over, an administrative investigation will occur here with the Sebastian Police Department. Our entire department is saddened by Diesel's tragic death; please keep us in your thoughts and prayers. More information will be released when available."