First - Hutchins can be represented without having to pay anything at all.
--- A high profile grand jury indictment means the public defender would likely seek out a private lawyer for pro-bono representation
--- A high profile case where the evidence against the accused is questionable typically has lawyers jumping out trees to represent them. Here, the key is... the evidence has to be weak. In this case... it's not. The evidence is seemingly strong against him.
If all you can do is raise $15K for a case like this... you're only going to afford one lawyer, likely without a huge amount of experience to find ways to win on technicalities. This also doesn't afford specialized assistance or pay for good expert testimony. You might as well take a lawyer assigned by the public defender, where they pick up the tab and must ensure a competent defense for the accused.
A decent lawyer costs around $800 to $1500 per hour. You only want your lawyer working 5 to 6 hours on your case... when at least 5-10 hours of this will be time in the courtroom.
Based on the evidence in this case... assume he's going to be found guilty and will need to file for an appeal (in which case, you REALLY need to have a good lawyer, not to mention pick up the FULL tab), you better attempt to raise in excess of $150K. Look closer to $300K.