An 18-year-old who was arrested in connection with the summertime assault and robbery of a 57-year-old man in the parking lot of an Ottawa Chinese restaurant likely will face time in state prison.

Terry T. Gibson Jr., Ottawa, pleaded no contest to one count of robbery Monday in Franklin County District Court, 301 S. Main St., Ottawa.

As part of a plea agreement that could require Gibson to provide testimony against a 17-year-old, male codefendant in the case, prosecutors amended the complaint against Gibson from one count of aggravated robbery to one count of robbery. Matt Franzenburg, a prosecutor with the Franklin County Attorneyís Office, told District Judge Thomas H. Sachse that Gibson was serving as a lookout during the July 11, 2013, robbery and did not attack the China Palace employee who was walking to his car about 11 p.m. that night after the restaurant closed.

A subsequent investigation led Ottawa police detectives to Gibson and the codefendant, Franzenburg said. Detectives found the victimís credit card and iPad in Gibsonís room the day after the robbery, Franzenburg said.

The victim, who told police he did not see his attacker, suffered minor injuries and was transported to Ransom Memorial Hospital, 1301 S. Main St., Ottawa, where he was treated and released, according to an Ottawa Police Department report.

Robbers took an undisclosed amount of money, an iPad, a manís brown wallet and a black attache-style bag from the injured man, the police report said.

Ottawa police detectives and officers developed leads about multiple suspects, and the departmentís Special Tactics and Rescue Team served a search warrant July 12 in the 300 block of South Walnut Street and a second search warrant July 13 in the 600 block of South Hickory Street, according to a police department news release. Evidence and items taken during the robbery were recovered from both Ottawa residences, the release said.

Jack Hobbs, Gibsonís defense attorney, said his client understood he likely would receive time in state prison in the felony case. The Level 5 felony carries a sentencing range of 31 months to 146 months in state prison. Hobbs requested his client be given a mid-range sentence.

Sachse ordered a presentencing investigation into Gibsonís criminal history, and said the defendantís criminal history would factor into his sentence.

A trial date has not yet been set in the codefendantís case, Franzenburg said.

Sachse set Gibsonís sentencing for 2 p.m. May 5.

Gibson remains in the Franklin County Adult Detention Center, 305 S. Main St., Ottawa, awaiting his sentencing.