The father of Apalachee High School shooting suspect Colt Gray pleaded not guilty Thursday and waived arraignment.

Colin Gray, who was not present in court, was indicted on 29 charges including murder in the second degree, involuntary manslaughter, reckless conduct and cruelty to children in the second degree. Investigators allege he purchased a SIG Sauer M400 as a Christmas gift for his 14-year-old son. The Sept. 4 school shooting killed two students and two teachers and left others injured.

Colt Gray waived arraignment last month. The teen was indicted on 55 charges last month including felony murder, malice murder, aggravated battery, cruelty to children in the first degree and aggravated assault.

Attorneys for Colin Gray waived arraignment on his behalf and entered the not guilty plea. His attorneys filed a number of motions Wednesday, most relating to discovery and evidence against their client, and plan to file around 30 additional motions in coming days.

Since discovery has not been provided, defense attorneys are asking for an extension to file additional motions on behalf of Colin Gray.

Subpoenas released this month by the Barrow County Clerk’s Office provided new details on the investigation into Colin and Colt Gray.

According to the subpoenas, investigators seek information from Georgia Department of Natural Resources about Colin and Colt Gray going to three different shooting ranges between Jan. 1 and Sept. 4, as well as customer information and purchase history from Amazon relating to an account belonging to Colin Gray.

No additional court date for either has been set.

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8/26/17 - Atlanta, GA - Georgia leaders, including Gov. Nathan Deal, Sandra Deal, members of the King family, and Rep. Calvin Smyre,  were on hand for unveiling of the first statue of Martin Luther King Jr. on Monday at the statehouse grounds, more than three years after Gov. Nathan Deal first announced the project.  During the hour-long ceremony leading to the unveiling of the statue of Martin Luther King Jr. at the state Capitol on Monday, many speakers, including Gov. Nathan Deal, spoke of King's biography. The statue was unveiled on the anniversary of King's famed "I Have Dream" speech. BOB ANDRES  /BANDRES@AJC.COM

Credit: Bob Andres