Question: Who directed the movie Bloody Wednesday which chronicles the San Ysidro McDonald's massacre in San Diego?

Context paragraphs:
San Ysidro, San Diego: San Ysidro (] ) is a district of the City of San Diego, immediately north of the U.S.-Mexico border.  It neighbors Otay Mesa West to the north, Otay Mesa to the east, and Nestor and the Tijuana River Valley to the west; together these communities form South San Diego, a pene-exclave of the City of San Diego, thus making it possible to travel (by water) between central San Diego and South San Diego without ever leaving the city limits.  Major thoroughfares include Beyer Boulevard and San Ysidro Boulevard.

Blue Line (San Diego Trolley): The UC San Diego Blue Line is a 15.4 mi light rail line in the San Diego Trolley system, operated by San Diego Trolley, Inc., an operating division of the San Diego Metropolitan Transit System (MTS).  It currently operates between Downtown San Diego and San Ysidro, at the border with Mexico.  The Blue Line has the highest ridership of the San Diego Trolley's three regular lines, transporting 15,094,878 riders during FY 2014 and 16,532,209 riders during FY 2015, according to the MTS.  It is named due to a $30 million naming rights deal with UC San Diego Health.

San Ysidro McDonald's massacre: The San Ysidro McDonald's massacre was a mass shooting that occurred in and around a McDonald's restaurant in the San Diego neighborhood of San Ysidro on July 18, 1984.  The perpetrator, 41-year-old James Huberty, shot and killed 21 people and injured 19 others before being fatally shot by a SWAT team sniper.

San Ysidro Port of Entry: The San Ysidro Port of Entry is the largest land border crossing between San Diego and Tijuana, and the busiest land border crossing in the world.  It connects Mexican Federal Highway 1 with Interstate 5 on the U.S. side.  The San Ysidro Port of Entry is one of three ports of entry in the San Diego–Tijuana metropolitan region.

San Ysidro Mountains: The San Ysidro Mountains are a mountain range in southern San Diego County, California.  The range extends for a short distance into Baja California.  The San Ysidro Mountains are part of the Peninsular Ranges System.

San Ysidro Transit Center: San Ysidro Transit Center is a San Diego Trolley station on the Blue Line and the southern terminus for this line.  The previous station northwest is Beyer Boulevard.  South of this station is the San Ysidro Port of Entry at the Mexico–United States border.  The station serves primarily as a way to provide access to downtown for the thousands of international commuters and tourists who travel between San Diego County and Tijuana, Mexico.  Its secondary purpose is to provide access to the large shopping areas, including the Las Americas Premium Outlets which are connected to the stop via a pedestrian walkway.  An intercity bus station is located adjacent to the station.

San Ysidro Elementary School District: The San Ysidro School District is a public school district in San Diego County, California, United States.  It includes five elementary schools, one middle school, and several preschools in the San Ysidro community in San Diego, California as well as two elementary schools elsewhere in San Diego.

Bloody Wednesday (film): Bloody Wednesday is a thriller movie based on the events of the San Ysidro McDonald's massacre and was directed by Mark G. Gilhuis.

Interstate 805: Interstate 805 (I-805) is a major north–south Interstate Highway in Southern California.  It is a bypass of I-5, running roughly through the center of the Greater San Diego region from San Ysidro (part of the city of San Diego) near the Mexico–U.S. border to near Del Mar.  The southern terminus of I-805 at I-5 in San Ysidro is less than a mile north of the Mexican border.  I-805 then traverses the cities of Chula Vista and National City before reentering San Diego.  The freeway passes though the San Diego neighborhoods of North Park, Mission Valley, Clairemont, and University City before terminating at I-5 in the Sorrento Valley neighborhood near the Del Mar city limit.

Las Americas Premium Outlets: Las Americas Premium Outlets is a 560000 sqft outlet mall in San Ysidro, San Diego, California located directly on the Mexico-United States border just west of the San Ysidro Port of Entry at the new PedWest crossing from Tijuana to Virginia Avenue on the U.S. side.

Supporting paragraphs: Bloody Wednesday (film) San Ysidro McDonald's massacre
Answer: Mark G. Gilhuis