Prince George's County police say they believe the same man, masked and armed with a crossbow, has broken into four homes since June -- the most recent on Sunday in the Bowie area -- and raped four women.
In each case, the assailant broke in through a sliding door, threatened the victim with a crossbow and rifle and bound her, police said.
Each attack occurred in a house near a wooded area. In one incident, the assailant used the crossbow to shoot and kill a victim's pet dog.
Police said the man was last seen wearing a black ski mask, black long-sleeved shirt, black sweat pants and black work gloves.
The latest attack occurred around 4:30 a.m. Sunday in Bowie, when a man broke into a single-family home through a sliding glass door. The man threatened the 24-year-old victim with a crossbow and displayed a small-caliber rifle. He tied up the victim, then sexually assaulted her.
Police said the first attack occurred June 7 in Glendale around 5:30 a.m. After breaking into the victim's townhouse, the man, using the crossbow, shot and killed the victim's dog, which was trying to protect its owner. The victim was then tied up and sexually assaulted.
The second attack happened in Greenbelt early Aug. 3. The man forced open a sliding glass door to a townhouse and threatened the victim and her husband with a crossbow. He then bound and sexually attacked the woman in front of her husband, who also had been tied up.
The third assault took place Aug. 16 in Bowie, several blocks from Sunday morning's rape. The assailant broke a sliding glass door, bound and sexually assaulted the victim.