Theodore Welp , former CEO of Tucson Electric Power Co ( pictured in 1982 ) . He was killed along with his wife and son in what has been described as a 'heinous ' crime in rural Idaho . A former Arizona power company executive , his wife and their adult son were identified on Thursday as the victims of a triple homicide in the foothills outside Boise . The Ada County Coroner 's office did not release the causes of death of Theodore M. Welp , 80 , Delores E. Welp , 77 , and their son , 52-year-old Thomas P. Welp . They were found dead on Tuesday . No motive has been released . Idaho authorities said they were working around the clock to find those responsible for a 'heinous ' triple murder at a rural home in the Boise foothills . One man has been arrested on theft counts . 'When I say this crime is heinous , that is probably an understatement , ' Ada County Sheriff Gary Raney said on Wednesday . 'Somebody who violently , without cause , without any provocation that I know of , killed three innocent people . We are working 24 hours a day with everything we 've got to put that person in jail . ' The Welps formerly lived in Arizona , where Theodore Welp was the chief of Tuscon Electric Power Co. ( TEP ) in the 1980s . Welp was in charge of building a facility in the late 1970s and spun-off a TEP subsidiary which made him and few execs millions of dollar , Tucsonnews.com reported . He was blamed by some for the financial downfall of the company . The Arizona attorney general 's office launched an investigation into the financial dealings but the probe resulted in no criminal charges . Investigators said no clear conspiracy or fraudulent acts could be proven . Theodore and Elaine Welp were also involved with charitable organizations , including an organization that funds research on vision impairment and blindness . A 22-year-old Nampa man arrested on Wednesday is accused of grand theft and forgery but not murder , the sheriff 's office said in a statement . Scroll down for video . A home where two men and a woman were found dead on Tuesday amid signs of a struggle at a remote , $ 800,000 home in Ada County , Idaho set on 20 acres . A police vehicle approaching the home in the Boise foothills . Police wanted to hear from anyone who was near the murder scene between Sunday and Tuesday night . Adam M. Dees was arrested at a Boise electronics store , The Idaho Statesman reported . Sheriff Raney said detectives were searching Dees ' home in hopes of finding more evidence . Authorities said Dees had tried to sell a wedding ring in recent days , but they do n't know if it 's connected to the killings . They asked the public to provide information if possible . He is accused of three felony counts each of grand theft and forgery and a misdemeanor count of carrying a concealed weapon without a permit . Dees was scheduled to appear in Ada County Court later on Thursday . Deputies also seized a 2003 black Subaru Legacy with a gold panel that Dees was driving . Adam Dees , 22 , is accused of grand theft and forgery but not murder following the killings . Raney declined to speculate on a motive or say if anything was missing from the home . He said the victims were related , and the killings occurred sometime between Sunday evening and Tuesday morning . He said police wanted to hear from anyone who saw the Subaru near the murder scene between Sunday and Tuesday night . ' I want the community to help us put the right person in jail , ' the sheriff said . 'It 's hard for me to fathom even after 31 years of law enforcement what could possibly motivate somebody to do to these people what they did . ' The killings took place in what records say is a three-bedroom , three-bathroom home on about 20 acres with a total value of about $ 800,000 . Authorities said the property has horses and other buildings . He said police responded after a family member called on Tuesday . ' I 've probably not seen a bloodier or more violent murder occur , ' Raney said . He said other law enforcement agencies were investigating , including the U.S . Marshals Service . The killings took place in what records say is a three-bedroom , three-bathroom home on about 20 acres with a total value of about $ 800,000 .
Theodore M. Welp , 80 , Delores E. Welp , 77 , and their son , 52-year-old Thomas Welp identified as victims in the Tuscon Electric Power foothills . They were found dead on Tuesday . No motive has been released . Theodore Welp was chief of Boise in the 1980s and was blamed by some for the downfall of the company . The Arizona attorney general 's office launched an investigation into the financial dealings but the probe resulted in no criminal charges . A 22-year-old Nampa man arrested on Wednesday is accused of grand theft and forgery but not murder .