•$5,000 in cash. Police determined Therrien had withdrawn $5,000 from Webster Bank three days before her body was found.
•Blood on a trash container near the apartment.
•Clothing, including two pairs of black pants with stains on them that was sent to the state crime lab for analysis.
•Some of Therrien's financial and other records.
Keeping records of all the evidence taken from the house and analyzing it took a long time, a police spokesman said Monday.
"That scene was very gruesome, so we had to gather a lot of evidence and submit it to different sources and wait for that evidence to come back," said Lt. Ricardo Soto.
"We have to document everything. It takes a long time to do that. Once we were able to do that and get the arrest warrant signed, then we made the arrest," he said.
The evidence had to be analyzed, he said, "and also in the meantime we were still doing the interviews. … A lot of man hours went into this case."
Therrien had called police to file complaints about Bednarz and his sister seven times in the nine months before her death, records show. The siblings called police on their mother, too.
In October 2009, Brett Bednarz was sentenced to a year of probation for a breach of peace charge stemming from an attack during which he placed a broomstick on his mother's abdomen and pushed down, according to court records.
In a tearful statement to the court, Therrien told the judge she loved her son, although she didn't want him to come near her again. He repeatedly beat her, she said.
Bednarz was ordered to get rid of his weapons — a .22-caliber rifle, two BB guns and a blowgun. The judge also put in place a no-contact order that would remain in effect for 20 years.
A charge of third-degree assault didn't stick because Therrien didn't want her son to go to jail, a prosecutor later said.
Bednarz did end up in jail for almost five months in 2011 after police found some marijuana during a search of the Manchester apartment where he was living.
He was sentenced to six months in prison on Jan. 26, 2011, according to court documents. He also was charged with violation of probation because of a 2009 sexual assault conviction.
Bednarz served until June 10, 2011, when he was discharged, said Andrius Banevicius, a state Department of Correction spokesman.
One of the last people to talk to Therrien was longtime friend Aline Doria. She said learning of the arrest from an East Hartford detective felt "like a weight was lifted off my shoulders."
Police continue to investigate the case and ask that anyone with information contact them at 860-528-4401.
— Staff writer Melissa Traynor contributed to this story.