Untreated mental illness, perhaps.
Mary Keane, a neighbor, said three men, including Kweder, lived in the townhouse.
She said she had seen Kweder and his roommate Andy Yu, whom property records list as the homeowner, arguing in the past.
“Yu was out front and talking with him in a very strong manner, saying, ‘No one wants to live with you,’ ” Keane said.
She said that Kweder was fond of polishing a blue Mustang he owned.
Pablo Alvizuri, another neighbor, said he was friends with Yu and regularly spent time at the house. He said he thought that all three roommates got along fairly well but that there had been tensions between Yu and Kweder over rent.
Kweder’s relatives declined to comment, but a high school friend and former roommate, Christopher Hendrix-Buxton, said he was shocked by Kweder’s arrest.
He described Kweder as an avid runner who was named a Washington Post All-Met athlete at Edison High School in the mid-1990s. Hendrix-Buxton said Kweder served in the Marines and had recently been working for UPS.
Hendrix-Buxton said Kweder had also recently revealed to him a diagnosis of a mental illness.