I don't think this investigation is going to be that tough. Let's look at the facts:
Denver's CW2 has the facts:
"Anthony was then handcuffed and taken to Denver Health Medical Center where he submitted to a blood test. That's when police called Anthony's fiancée to pick him up.
The law states when you're arrested for DUI in Denver, you're either taken to Detox or released to a sober, responsible party. Anthony's fiancée refused to come get him, leaving police with only one choice—take Anthony to Detox.
Instead, the sergeant who responded personally took Anthony in his police car to the Ritz-Carlton Hotel in downtown Denver, were Anthony and his fiancée were staying."
It gets better though:
"In addition to the Sergeant driving Anthony to his hotel, another officer drove Anthony's $130,000 silver Mercedes to a parking lot at the Denver Police Traffic Operations Bureau until he could pick it up later in the day.
Typically, the arresting officer would tow a car involved in a DUI case to an impound yard or drive it to a safe, but neutral location."
I think it's pretty clear, 'Melo got pampered after doing something terribly immoral.
Police investigate preferential treatment in Anthony DUI case (CW2)