Lori Vallow's brother researched guns before attempted shooting

's killer brother researched firearms before an attempted shooting of 's wife - and Googled 'trannys' and pornography.

Detective Vince Kaaiakamanu told Vallow's murder trial Wednesday that in the days leading up to Tammy Daybell's death, Alex Cox searched for bullet drop data, using an AR-15 in cold weather and shooting a victim inside a vehicle.

Kaaiakamanu said he believed Cox was trying to gauge where to stand in order to shoot Tammy. on October 19, 2019 - ten days after an intruder pointed a gun at her. Her husband Chad Daybell and Lori Vallow are accused of murdering her. The pair married two weeks later in Hawaii.

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