Detectives involved in the investigation of Thomas Valva's death testified on the second day of Angela Pollina's murder trial.

The day started with a second juror being dismissed - leaving only four alternate jurors before detectives began to testify.

Detective Michael Ronca explained to the jury the layout of the home, where items were found and more through photos, videos and physical evidence.

Pollina - the ex-fiancee of former NYPD officer Michael Valva - is charged with murder in the second degree. She is accused of banishing Thomas and Anthony Valva to the home's unheated garage and forcing the autistic boys to sleep there for months.

Prosecutors claim the child's death was the result of years of abuse, maltreatment and neglect. The defense says that the father - Michael Valva - is the person responsible for his son's death.

Michael Valva is serving 25 years to life for Thomas Valva's death.

Pollina pleaded not guilty to the charges she is facing. She is expected to take the stand herself during the trial.

"What I promised the jury is full transparency. We're going to come out and own up to what was not good, what was wrong, but she is going to tell the jury she had no part in what happened," says defense attorney Matthew Tuohy.