(Fort Lauderdale, Florida) A year after the brutal murder of  transgender teen Simmie Williams, police in Fort Lauderdale are not near making an arrest.

Police said that Williams was wearing female clothing and may have been working as a prostitute.  She also was known to go by the names Chris and Beyoncé.

Police said that people nearby heard Williams arguing with two men, but did see the argument. Then two shots rang out.

On Sunday, Williams’ family and friends gathered at the spot of her killing for a candlelight vigil. A number of local politicians and law enforcement officials also attended.

“I won’t have peace until his killer is caught,” Williams’ mother, Denise King, told the Sun-Sentinel before the vigil began.

Police say they have not given up.

“We have not forgotten about Simmie, and we will not forget about Simmie,” Fort Lauderdale Police Detective Brice Brittenum told the crowd.

But investigators say they still don’t have a motive, let alone a suspect. It remains unclear if the slaying was a hate crime or a robbery gone wrong.

The site of the killing is near that of another unsolved murder of a trans woman who was transitioning and still using her birth name, Timothy Broadus, in 2003.