What is Rule 4(c) of FRCP?
General - Service - summons must be served with a copy of complaint. P is responsible for having completed service within the allotted timeframe as dictated by Rule 4(m) and must furnish necessary copies to the person doing the service.
By Whom - Any person at least 18 yrs old who is not a party to the action
By a Marshall or someone specially appointed - At P's request, court may order service be made by a US Marshall or someone specifically appointed by the court. The court must so order if the P is authorized to proceed in forma pauperis (pauper, poor person) or as a seaman.