An arrest and imprisonment under a warrant issued without valid legal authority for the restraint imposed gives rise to a cause of action for false imprisonment, and good motives and probable cause for the tort-feasor's conduct are immaterial. Nesmith v. Crawford, 318 F.2d 110 (5th Cir. 1963) (applying Ala. Laws). A Probate Court is a court of limited, fixed jurisdiction and when acting in a commitment proceeding, unless it complies with all statutory mandates, its orders are null and void, without jurisdiction or valid authority. Ala. Code, Title 45, § 210 (1940) (Recompiled 1958); McCaa v. Grant, 43 Ala. 262; Moseley v. Tuthill, 45 Ala. 621 (1871); Fowler v. Fowler, 219 Ala. 457, 122 So. 444. A physician who signs a certificate of insanity which is false, without exercising ordinary care and prudence in making his examination, and without making due inquiry to the question of sanity, is liable to an action for damages. 70 C.J.S. Physicians and Surgeons § 49 (1951); Crouch v. Cameron, 414 S.W.2d 408 (Ky. 1967); Beckham v. Cline, 10 So.2d 419 (Fla. 1942); Kleber v. Stevens, 39 Misc.2d 712, 241 N.Y.S.2d 497 (1963); Ayers v. Russell, 50 Hun. 282, 3 N.Y.S. 338 (1888); Bacon v. Bacon, 76 Miss. 458, 24 So. 968 (1899). If the act of an independent agency could have been reasonably foreseen by a tort-feasor at the time of his original negligence, the act of this independent agency does not cause the chain of proximate causation to be broken. 86 C.J.S. Torts § 26 (1954); Liberty Natl. Life Ins. Co. v. Weldon, 267 Ala. 171, 100 So.2d 696.