Sure, that's possible. But, even if it were some sort of other crime that was exacerbated or precipitated by a drug addiction, the fact that the sentence included the option of rehab + probation seriously limits the badness of that crime.

If this were the scenario, and I had to guess, I would say it probably was some sort of property crime. People other than the perpetrator tend not to get seriously (physically) injured in most property crimes, and insurance often covers the damages. In any case, monetary restitution to cover the damage plus rehab. should be a sufficient sentence.