where Wiles , then 26 , ran a branch of his family 's international aircraft maintenance business , National Flight Service , at Lakeland Linder Regional Airport . The FBI said Holt worked for Wiles at the time he disappeared . He was among several employees who told investigators they last saw Wiles on April 1 , 2008 , at the office and had no clue what happened to him . The FBI wo n't reveal the suspected motive or why agents believe it was Holt who left a uniquely signed ransom note demanding money two days after Wiles disappeared . At the time , agents said Wiles ' father tried to comply with the demand to get back his son , but heard nothing . Holt is described as an employee who , at least at one time , had a supervisory role at the company . Authorities say he now works as a contract employee doing similar flight maintenance work at Patrick Air Force base near Cape Canaveral in Florida . Wiles was single . When he vanished without a trace , fellow employees said they were stunned . `` All that he ever worked on was customer
-LRB- CNN -RRB- -- Missing Florida pilot Robert Wiles , who was believed kidnapped and held for ransom 21 months ago , now is believed to be dead , and a former co-worker is in custody , accused of his death , the FBI said Friday . Authorities arrested Stobert `` Tobie '' Holt Jr. , 42 , Friday in Orlando , Florida , after he arrived from Colombia , where he was on a business trip , according to Tampa-based FBI spokesman David Couvertier . Holt faces state charges of first degree murder , kidnapping , extortion , and intent to inflict death or serious bodily harm , the spokesman said . The arrest was made by police from Lakeland , Florida , the Polk County Sheriff 's Office and the Florida Department of Law Enforcement , who were accompanied by FBI agents , he said . Though authorities now believe Wiles was killed , they do n't know where his body is , he said . The arrest was uneventful , Couvertier said : `` Holt was advised of his rights and said nothing . '' A four-count grand jury indictment was unsealed Friday in Polk County ,