Police enter Hernandez's home

Law enforcement officials on Saturday entered the home of New England Patriots tight end Aaron Hernandez, who is being investigated in connection with a homicide of an associate.

Authorities arrived at Hernandez's North Attleborough, Mass., home just before 2 p.m. ET, bringing two police dogs, carrying paperwork and what appeared to be crime analysis equipment.

Authorities are expected to execute an arrest warrant at some point for Hernandez for obstruction of justice, sources told ABC News on Friday.

The warrant was prepared after police discovered that the security system at Hernandez's home, along with his cellphone, were destroyed, sources told ABC News.

Hernandez returned home Friday, driven by his lawyer, Michael Fee.

Police also were at Hernandez's home Thursday with another search warrant based on evidence that Hernandez "destroyed his home security system," an investigator close to the case told ABC News.

The investigator and other law enforcement sources confirmed the security system was smashed intentionally. Hernandez's cellphone was handed over to investigators "in pieces" by his attorneys, sources added. Police also want to know why a team of house cleaners was hired on Monday to scrub Hernandez's mansion, sources told ABC News.

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