New Delhi, Sept. 18 -- Tyler Robinson, accused in the Utah college shooting that killed Turning Point USA founder Charlie Kirk, underwent a drastic transformation in the year leading up to the attack, according to statements made by his mother to investigators.

Robinson, once a college scholarship recipient with what his family believed was a promising future, had "become more political," his mother told police. She said he increasingly leaned left, openly supporting "pro-gay and trans rights."

The family home became a battleground of ideologies, with Robinson and his father often engaged in heated disputes.

"They argued constantly," his mother recalled, according to court documents. Investigators noted that the disagreements reflected...