Vermont is on track to become the 13th US state to ban the outdated and abhorrent gay and trans panic defences.

The Vermont Senate unanimously voted Wednesday (21 April) to sign a state measure that will stop defendants from citing a victim’s sexuality or gender, perceived or otherwise, to justify the killing of queer people.

The decades-old legal strategy, long used to chillingly win a jury’s sympathy, lessen charges or shorten a sentence, says that people kill or become violent in a state of temporary insanity because the victim is LGBT+.

While the defence has never been used in the state, senators voted 29-0 to stop anyone from becoming the first, VTD reported.

In doing so, gay senator Brian Campion said on the virtual floor, provision H128 “will never allow a senseless legal argument to act as cover for personal, societal or systemic prejudices and biases”.

“This bill ensures Vermont courtrooms never allow such obvious bigotry to come into trial – to heap further suffering onto the victim,” he added.

“As a gay man, I take great pride in this body taking this step – another step in a long line of steps it has taken – to undo, reverse, and end long-held and entrenched societal bigotries.”

The Vermont Senate will give final approval to the legislation Thursday (22 April) after which it will be shuffled back to the House.

Considering House lawmakers already passed a version of the bill 144-1 last month, the bill is unlikely to face any roadblocks.

Senators tweaked the bill to stop the defence from being mounted not only at trial but during sentencing, too.

The move follows Virginia, whose governor signed the ban into law earlier this month, and may soon be followed by Maryland – the bill passed its third reading 47-0 this month.