An arrest warrant for obstruction of justice will be issues against Aaron Hernandez.

Police discovered that the security system at Hernadez's home and his cellphone were destroyed.

Police were at Hernandez's home again on Thursday.

Hernandez's cellphone was handed over to investigators "in pieces" by his attorneys, sources added. 

Hernandez's mansion was also cleaned on Monday.

Surveillance video from the North Attleborough, Mass., neighborhood of Hernandez shows him with Odin Lloyd and two other people hours before Lloyd was killed earlier this week.

Lloyd was dating the sister of Hernandez's girlfriend.