The husband of a woman found dead inside their Sydney home has spoken of walking into the "biggest nightmare" as police continue searching for answers on her suspicious death.
Erin Gilbert, 42, was discovered in the couple's Merrylands apartment after neighbours called police about 11.30pm on Sunday to report concerns for her welfare.
Nic Gilbert said he arrived home on Sunday night and pressed the doorbell but no one answered.
Assuming his wife was asleep, the 38-year-old said he threw a rock at the window to get her attention before using a bin to climb over the balcony when there was again no response.
"(I) walked into the biggest f***ing nightmare," he told media on Wednesday.
"I walked through the bedroom, Erin was on her back and it looked like she was choking on blood."
Mr Gilbert said he tried to resuscitate his wife and perform CPR before police officers arrived at the Newman Street unit.
"I feel like I let her parents down. I feel like I should've been there," he told Nine News.
Local police commander Superintendent Andrew Holland told reporters on Tuesday that Ms Gilbert suffered "serious and severe" injuries, but her cause of death was not yet known.
"The injuries (were) very serious and severe. Unfortunately, we don't know the exact cause of death at this point," he said.
Mr Gilbert was taken to Granville Police Station for questioning and was released without charge.
"He hasn't been ruled in or ruled out at this stage," Supt Holland said on Tuesday.
Police are appealing for help from the public to establish a timeline in the case.
"When police arrived, she hadn't been passed away for long," Supt Holland said.
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