The McCowan murder trial continued today with more testimony from the roommate and witness Tyler Aho.
Connor McCowan is accused of stabbing his sisters boyfriend, Andrew Singler back in May.
Aho saw it happen, and admitted today that he had tried to hold Singler back from confronting McCowan. Aho said he was overcome by Singler who punched McCowan before he was stabbed.
Both sides admit Singler threw the first punch, but Prosecutors say McCowan came there planning to do more.
There is no word on if Shay McCowan will testify today. Shay was dating Singler at the time.