A Utah health teacher has been arrested for allegedly shooting and killing her ex-husband's girlfriend in front of the former couple's twin daughters.
Police said Chelsea Watrous Cook, 32, went to her ex-husband's Salt Lake City apartment on Sunday night local time to give one of their three-year-old twins cold medicine.
Cook allegedly locked herself in a bathroom when her ex-husband Travis Cook asked her to leave.
![Police say Chelsea Cook shot and killed her ex-husband's girlfriend. Photo / AP](https://www.nzherald.co.nz/resizer/v2/QBB7ANZEHD6TADGYSIFJNSITOQ.jpg?auth=59f69d06c66bca7bd9c193061dcddc74c5b48c7ec076f7812f085e95aedb5298&width=16&height=22&quality=70&smart=true)
She eventually came out of the bathroom and grabbed a gun from her coat, according to police.