A criminal complaint charging Francisco C. Mountain with sex assault and other crimes tells a harrowing story of a rape that allegedly happened in a Lakeville home the night of April 27.

When police arrived shortly before 3:30 a.m., a “very intoxicated” woman was sitting on the floor, her lower body wrapped in blood-soaked towels. A claw hammer with the claw end wrapped in plastic lay nearby.

Later, a nurse told investigators that the woman had jagged and slice-like internal lacerations ranging from 2 to more than 3 inches, and half-inch tears externally. She was in critical condition when she arrived at the hospital and was rushed into surgery, court documents said.

Mountain, 39, whose city of residence is listed as St. Paul, is charged in Dakota County District Court with two counts of first-degree criminal sexual conduct, first-degree assault, terroristic threats and felony domestic assault. He is being held in the county jail in lieu of $175,000 bail. His next hearing is June 19.

According to the complaint, Mountain told one officer that he and the victim had sex and that the woman was bleeding. He said he thought the woman was having her period, but when the bleeding didn’t stop after 30 minutes, he called 911.

Shortly after police left the home, a paramedic told officers that the victim had said Mountain had choked her. About 6:30 that morning, a nurse called police to tell them the extent of the woman’s injuries. In addition to the cuts, the woman’s neck was bruised and she reported being kicked in the stomach.

Mountain was arrested that afternoon when he tried to visit the victim in the hospital. He had two bags with him, one of which contained a hammer matching the claw hammer officers had seen at the house.

Officers eventually talked to the woman in the hospital. She said she remembered drinking and taking Nyquil because she was sick. She said she went to bed and didn’t remember the sexual assault.

About two weeks after the attack, a supervisor of the sexual assault nurse examiner program at Regions Hospital in St. Paul reviewed the victim’s chart and photographs and called the injuries “the most extensive injuries she has ever seen in all her years as a … nurse,” the criminal complaint said.

Mountain is on probation from a conviction for felony domestic assault last May in Roseville. It’s unclear whether that case involved the same woman. He was given a stayed 21-month sentence and served 90 days in jail. He has previous convictions for domestic assault, second-degree assault and theft that date to 1994.