( CNN ) -- As investigators in Georgia looked into the death of a 22-month-old boy left seven hours in a sweltering SUV , they seized computers from the father 's office , a source with knowledge of the investigation told HLN 's Nancy Grace . The officers found something startling : an online search for information about how long it takes animals to die in hot cars , the source said . It 's unknown when the Internet search was conducted and whether the father did the searching . Police have declined comment when asked about the computer search . The father , Justin Ross Harris , has pleaded not guilty to charges of murder and second-degree child cruelty . He sits in jail without bond , with an appearance before a judge set for next Thursday . Police in Cobb County , just outside Atlanta , have been tight-lipped and have n't said whether what they found on the computer is one of the reasons they arrested Harris . Father wo n't attend son 's funeral . The funeral for Cooper Harris will be held Saturday in Tuscaloosa , Alabama . Justin Harris , 33 , wo n't be allowed out of the Cobb County Jail to attend , sheriff 's office spokeswoman Nancy Bodiford said . The child 's mother wanted to obtain photos of her son from the seized computers for use at the funeral but Cobb County police turned down her request , said Maddox Kilgore , the attorney for Harris . Police spokesman Michael Bowman told CNN , `` If we have evidence , we will not be releasing that due to chain of custody issues . '' Bowman would not confirm what , if any , evidence they had in their possession . A charity fund at Harris 's employer , The Home Depot , will pay for the funeral , company spokeswoman Catherine Woodling told CNN . Harris , who worked as a web designer , has been placed on unpaid administrative leave , she said . The funding of the funeral from the Home Depot charity , the Homer Fund , is a `` standard approach , '' she said . In an obituary for Cooper appearing in the Tuscaloosa News , the family asks that in lieu of flowers donations should be made to the Homer Fund . 'What have I done ? ' Initially , police described the June 18 death of the toddler as the result of tragic absent-mindedness . They said the dad had apparently forgotten the boy was in the back seat of his Hyundai Tucson ; he did n't remember until he was done with his workday , drove a couple of miles and pulled into a shopping center parking lot . But suspicions grew as police investigated . `` The chain of events that occurred in this case does not point toward simple negligence , and evidence will be presented to support this allegation , '' said Cobb County Police Chief John House . A criminal warrant released Wednesday described the events that led to Cooper 's death . A timeline of events . On the day Cooper died , Harris stopped for breakfast at a fast-food restaurant and afterward strapped his son into a rear-facing child restraint seat on his SUV 's back seat , police said . He drove to his workplace , a Home Depot corporate office , about a half-mile away . He works as a Web designer there . Usually , he would take his son to an on-site day care . But that day , police said , Harris left him in the car seat . During his lunch break , he returned to his car , opening the driver 's side door to put something inside , police said . After work , around 4:16 p.m. , the 33-year-old father got in his car and drove away . A few miles away , he stopped the car at a shopping center and called for help . When it became clear Cooper was dead , Harris was so inconsolable police had to restrain him . `` What have I done ? '' he wailed as he tried to resuscitate the boy . A wave of sympathy . Each year , dozens of children die from heat strokes in cars , according to KidsandCars.org . More than 40 died last year . The organization says its tally is likely incomplete and much lower than the real toll . The charging of Harris triggered a wave of sympathy and a vigorous debate over whether the heartbroken father should be punished . Two change.org petitions urging authorities to release Harris were started and then shut down this week . One petition posted this note : `` I think that based on the recent developments this petition is no longer relevant . I still pray that this was truly an accident . If that is the case , the DA now knows that the community does not want Justin prosecuted on murder charges . '' Another , set up at YouCaring.com , has raised more than $ 22,000 for the Harris family . `` Please do n't listen to the media . It just upsets me to watch it , '' wrote Heather McCullar , who set it up . `` Please do n't listen to the media . The family will speak when they can . '' Contacted by CNN via e-mail , she wrote back , `` No one is allowed to comment right now . '' `` The manner of death is homicide '' As Harris sits in jail , his wife , Leanna , would not discuss the case with the media . The Cobb County medical examiner 's office found the child 's cause of death `` consistent with hyperthermia and the investigative information suggests the manner of death is homicide , '' according to a Cobb County Department of Public Safety statement issued Wednesday . Temperatures hit 92 degrees Fahrenheit on the day of his death . The medical examiner 's office is waiting for toxicology test results before making an official ruling as to the cause and manner of the toddler 's death . Read the criminal warrant ( PDF ) CNN 's Victor Blackwell , Devon M. Sayers , MaryLynn Ryan and Joe Sterling contributed to this report .
NEW : Funeral for David Harris will be Saturday in Alabama ; family ca n't attend . Source says police seized computers from father 's car after startling Web sites . It 's unclear who conducted online searches on animal deaths in hot cars , source says . The father was left in a hot car , strapped to his seat in suburban Alabama last week .