( CNN ) -- A man who escaped from an Arkansas jail last week might be headed to a county in the neighboring state of Missouri , a sheriff 's deputy said Monday . Derrick Estell and Tamara Upshaw , the woman alleged to have driven a getaway vehicle , may try to go Dallas County -- a place Estell has visited before , according to Garland County Sheriff 's Department Deputy Scott Hinojosa . Tips on Estell 's whereabouts have run into dead ends and law officers in Dallas County were working to see if he were in that community . July 28 surveillance video from Sunday shows Estell talking on the phone and then sliding through a 12-by-30-inch reception window at the Garland County Detention Center while another prisoner distracts deputies . He then runs out the front of the jail -- with a deputy not too far behind him -- jumps into a waiting car that speeds away . The getaway car was found , abandoned , just a few minutes away but there was no sign of Estell . Estell 's mother was arrested Friday for allegedly helping her son . Glenda Estell , 54 , was arrested without incident around 10:40 a.m. at her home in Hot Springs , Arkansas , according to the arrest report . She is set to appear in court August 13 on one charge of assisting in or furnishing an implement of escape for an inmate . Upshaw had been staying with Glenda Estell and was with her the day of Derrick 's escape , according to the affidavit laying out probable cause for Glenda Estell 's arrest . The same document details a July 28 phone call between Glenda and Derrick Estell , while the latter was in the detention center 's booking room , just before the escape . At the beginning of the conversation , Glenda Estell says `` it 's all good , '' then asks if his shackles are off and questions `` is there two or three in there ? '' Previous phone conversations between mother and son that `` all have random mentions of the plan for Derrick to escape custody , just at various intervals between normal conversations , '' the arrest affidavit states . Derrick Estell has a lengthy rap sheet , which includes charges of aggravated robbery , breaking and entering , and burglary among others .
Derrick Estell might be in Dallas County , Missouri , a deputy says . His mother was arrested last week for allegedly helping her son . He was talking on the phone with his mother when he bolted , authorities say .