( CNN ) -- Investigators have arrested a third suspect in the killing of a prominent doctor near Houston , Texas . Dr. Jorge Mario Gonzalez was found dead at his ranch last month , police say . The Texas Rangers arrested Misael Sotollo , 18 , Tuesday evening in a Houston apartment , the Austin County Sheriff 's Office said in a statement . Sotollo and two others -- brothers Cristobal Galvan Cerna , 23 , and Moises Galvan Cerna , 18 -- are charged with murder in the death of Dr. Jorge Mario Gonzalez . Bail has been denied for all three , according to authorities . The doctor was chief of the critical care section at Houston 's Methodist Hospital and `` a pulmonary medicine leader , '' according to the hospital system 's Web site . Gonzalez was found dead August 22 , after deputies responded to a 911 call of a burglary in progress at his weekend ranch , in a rural and isolated area outside Bellville , Texas , authorities said . Bellville is about 50 miles west of Houston . The suspects were already at the home when the Gonzalez family arrived around noon , law enforcement officials said . The doctor was able to enter his home and obtain a handgun in an attempt to defend himself and his family , authorities said . Gunshots were exchanged , and the doctor died at the scene , they said . Also wounded in the shooting was ranch hand Noel Galvan Cerna , who worked for Gonzalez and is the brother of two of the men in custody in the killing . Sotollo is their cousin . An officer responding to the Gonzalez home on the robbery report was met by vehicles leaving the location , Austin County Sheriff 's spokesman Sgt . Paul Faircloth said , and a person in one vehicle fired on the officer . Neither the officer nor his patrol car was struck , and the officer did not return fire , Faircloth said . The officer was able to provide a detailed description of the vehicles , he said . The officer found Gonzalez ' wife and toddler unharmed inside the home .
Dr. Jorge Mario was found shot to death at his ranch on August 22 . Police say Gonzalez arrived at the rural ranch to find suspects already there . He was able to get his gun from the house but died in the gunfire , police say . His hand was injured in the attack ; the suspects are his brother and cousin .