Article continues below advertisementTyler Robinson's family is standing firm against allegations linking him to the tragic shooting of conservative activist Charlie Kirk. The accused shooter's grandma, Debbie Robinson, 69, expressed disbelief at the notion that her quiet 22-year-old grandson could be involved in such violence.Debbie revealed that despite her son's support for President Donald Trump - a staunch Republican - Tyler rarely discussed politics.Article continues below advertisementSource: MegaTyler Robinson's grandma claimed he was a Trump-leaning Republican.