Alvin Luis

The man accused of shooting his sister in the hand while she tried escaping the South San Francisco home where he held their family hostage last fall may be incompetent to stand trial on two dozen felony charges including premeditated attempted murder.

Alvin Baja Luis, 56, of San Francisco, is also charged with residential burglary and several counts each of felony assault with a firearm, false imprisonment and making criminal threats. However, before he could begin an estimated 10-day jury trial yesterday, his attorney raised questioned about Luis’ ability to aid in his own defense, said Chief Deputy District Attorney Karen Guidotti.

Court-appointed doctors will now evaluate Luis to determine if he’ll stand trial or be committed to a state mental hospital for treatment.

Prosecutor say on Nov. 20, 2011, Luis arrived at his sister’s home at 521 Spruce Ave. with duct tape, ammunition and two guns. Luis, reportedly angry about his deceased mother’s estate, is accused of brandishing a pellet gun and a handgun toward the seven people inside which included his two sisters, children and family friends gathered for a football game. He reportedly hit one sister in the back of the head with a weapon, kicked another sister in the stomach and shot one in the hand when the group tried escaping out a bedroom window.

Luis fled to a Carl’s Jr. in San Francisco where he was later apprehended. Officers also reported recovering the weapon and finding the tape and a bag of ammunition at the crime scene.

He is in custody without bail.