Ralston police made an arrest in the armed robbery of Tobacco Phones 4 Less.
The store, located at 7210 Harrison St., was robbed by a suspect displaying a handgun at about 2:45 p.m. on Jan. 14.
Police arrested a 16-year-old male for robbery and use of a weapon to commit a felony.
At the time, the Ralston Police Department was investigating another matter. They collected evidence and a suspect developed.
Police later determined that the suspect was on electronic monitoring. The GPS records and other evidence in the case led to the arrest.