HOUSTON The murder trial of a 19-year-old Katy teen accused of killing a 17-year-old female friend was under way Monday.
Prosecutors said it all started with a bad breakup, and then fear took over.
Alexander Olivieri is accused of shooting Bridgett Frisbie execution-style in April of 2011 in a wooded area of Katy.
The two went to high school together.
Prosecutors told jurors in an opening statement Monday that Olivieri had shot up the house of Frisbie s ex-boyfriend, volunteering to take care of him.
Frisbie then started telling people about it, and prosecutors said Olivieri felt he had to keep her quiet, fearing he might get kicked out of the National Guard if anyone found out.
Alan Perez is the key witness for the prosecution. He was there at the time of the shooting, and said he was a reluctant participant in a plan that was just supposed to scare Frisbie.
Perez said he tried to say no to going with Olivieri that night, but in the end, he went along anyway.
I was kinda afraid of him. If I would have disobeyed I don t know what would have happened. If I would have run away he would have chased me. I d have a bullet in my back. Multiple, he said.
Perez has been given immunity in exchange for his testimony.
Olivieri was free Monday on $50,000 bond.
Prosecutors said they expect the case to wrap up this week.
The defendant may also testify.