The suspect was identified as Dillon Anthony Klincke, 31, of Los Angeles. He was arrested Wednesday in the 1200 block of Meadowbrook Avenue, according to the Los Angeles Police Department.
Klincke's bail has been set at $175,000.
The crime occurred shortly before 2:30 p.m. Wednesday when a man entered a house in the 6600 block of West Fifth Street, police said.
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"Once inside the location the suspect pistol whipped the victim and demanded access to a safe that contained a large amount of expensive jewelry," the LAPD said in a statement. The man gained access to the safe, removed the jewelry and fled, the news release said.
The victim suffered bruises and lacerations as a result of being struck by the intruder, according to investigators. She was treated by firefighter-paramedics at the scene.
"This investigation is in its early stages and a total dollar amount has not been determined," the police statement said.
Before the arrest, the news release said the suspect was described only as a man "wearing a 'Halloween'-type mask." Whether police were referring to the "Halloween" horror movie franchise or the holiday was unclear.
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There was no evidence that the home invasion was a "follow-home" robbery, the LAPD said.
Anyone with information about the robbery is asked to call Robbery-Homicide Division Detective Robert Hoebink at (213) 486-6840.