"Remand in custody" means that a prisoner is sent back to jail. According to the New York State Unified Court System, prisoners and those who have been accused of a crime before a court of law can be remanded to jail.
The New York State Unified Court System explains that failure to appear in court at scheduled hearings when an individual has been released from jail on a bail bond can result in a judge ordering the individual to be taken into custody and returned to jail. According to the Federal Defenders of New York, individuals who have been out on bond pending a court trial can be remanded to jail to wait for the judge to sentence them for their crimes if they receive a guilty verdict.
According to HowStuffWorks, a bail bond is money that the person accused of a crime pays in exchange for being released from jail pending the trial and decision of the case. HowStuffWorks explains that the bail bond that individuals pay is only a portion of the entire bond that the court sets. Paying the bond allows individuals that the court believes intend to appear at their court dates to continue to be productive members of society while they await trial.