The 19-year-old daughter of a Wyoming police chief is facing criminal charges after allegedly poisoning her roommate’s dog, leading to the animal’s death.
Allie Erspamer has been charged with felony cruelty to animals resulting in the death or euthanasia of an animal, according to an affidavit filed in Sweetwater County court on Sept. 29, 2025.
The dog’s owner, Hallie Blake, contacted the Sweetwater County Sheriff’s Office in April to report a suspected poisoning of her pit bull, Lilly, which ultimately had to be euthanized, the affidavit states.
Blake told authorities she adopted Lilly as a puppy in December 2024.
In late January 2025, Erspamer — the daughter of Rock Springs police chief Bill Erspamer — moved into Blake’s home. Shortly after moving in, Erspamer allegedly “expressed distaste” for the dog, Blake told investigators, according to the affidavit.
Roughly two months later, Lilly began experiencing seizures. As the dog’s condition deteriorated, Blake took her to a veterinarian multiple times between mid-March and April 17.
Blake told authorities that after Lilly became ill, Erspamer said the dog had bitten her, though the bite did not break the skin, the affidavit alleges.
A veterinarian informed Blake that Lilly appeared to be suffering from acute kidney failure and recommended euthanasia. The dog’s remains were then sent to the State of Wyoming Veterinarian Crime Lab in Laramie to determine the cause of death.
According to the affidavit, a necropsy report concluded that Lilly died from kidney failure caused by antifreeze poisoning.
Blake also told officials that Erspamer had discussed the alleged poisoning with a friend on Snapchat, the affidavit says.
Investigators obtained a search warrant for Erspamer’s Snapchat account. The affidavit alleges that records showed she had asked the app’s artificial intelligence search engine questions such as, “Can an autopsy on a dog show antifreeze poisoning,” “what about bleach,” and “how long would it take for bleach to kill a dog.”
Erspamer was later released from jail on a signature bond.
If convicted, she faces up to two years in prison and a possible fine of up to $5,000.
Her attorney could not immediately be reached for comment.
Erspamer is scheduled to return to court on Nov. 26.
